Turtle Rock Studios

Turtle Rock Studios was founded by Michael Booth. Prior to the company's establishment, Booth, Phil Robb and Chris Ashton worked for Westwood Pacific and participated in the development of real-time strategy games like Command & Conquer: Red Alert 2. Ashton, who had also worked for Presto Studios,{{cite web|url=https://www.vg247.com/2014/03/24/evolve-turtle-rock-refines-the-left-4-dead-co-op-formula/|title=Evolve: Turtle Rock refines the Left 4 Dead co-op formula|first=Dave|last=Cook|work=VG247|date=March 24, 2014|access-date=August 17, 2015|archive-url=https://web.archive.org/web/20150906145055/http://www.vg247.com/2014/03/24/evolve-turtle-rock-refines-the-left-4-dead-co-op-formula/|archive-date=September 6, 2015|url-status=live}} was impressed by Counter-Strike, which was a popular mod of Half-Life, and decided to join the mod team as a texture artist. Eventually, Seattle-based Valve, the publisher of Half-Life, purchased the mod, and Ashton left Westwood to join Valve. Robb and Booth remained at Westwood Studios and worked on Command & Conquer: Yuri's Revenge and Command & Conquer: Generals, but left the company after it was acquired by Electronic Arts, as Robb considered EA's acquisition of Westwood had resulted in the studio losing all its personality.{{cite magazine|url=https://www.gameinformer.com/b/features/archive/2014/01/31/life-after-death-the-story-of-turtle-rock-studios.aspx|title=Life After Death: The Story Of Turtle Rock Studios|first=Ben|last=Hanson|magazine=Game Informer|date=January 31, 2015|access-date=August 18, 2015|archive-url=https://web.archive.org/web/20150924052138/http://www.gameinformer.com/b/features/archive/2014/01/31/life-after-death-the-story-of-turtle-rock-studios.aspx|archive-date=September 24, 2015|url-status=live}}

Turtle Rock Studios was founded in 2002.{{cite web|url=http://www.eurogamer.net/articles/turtle-rock-studios-reforms|title=Turtle Rock Studios reforms|first=Tom|last=Bramwell|work=Eurogamer|date=March 18, 2015|access-date=August 17, 2015|archive-url=https://web.archive.org/web/20150924153020/http://www.eurogamer.net/articles/turtle-rock-studios-reforms|archive-date=September 24, 2015|url-status=live}} The team of about six people had limited resources so set up work space in Booth's garage. The name "Turtle Rock" derived from the name of a neighbourhood where Booth lived. The team expanded the studio and rented an office, and continued the development of Condition Zero. The game was released in 2004. Satisfied with the work done by Turtle Rock, Valve continued to contract them to work on the Xbox version of Counter-Strike, as well as the next installment of the series, Counter-Strike: Source, and Half-Life 2: Deathmatch.{{cite web|url=http://news.xbox.com/2015/02/games-the-pedigree-of-turtle-rock-studios|title=Never Stop Evolving: The Pedigree of Turtle Rock Studios|work=XboxWire|publisher=Microsoft Studios|date=February 9, 2015|access-date=August 17, 2015|archive-url=https://web.archive.org/web/20150628092954/http://news.xbox.com/2015/02/games-the-pedigree-of-turtle-rock-studios|archive-date=June 28, 2015|url-status=live}} Upon the release of Source, the company wanted to work on a new game, and gained support from Valve. The team later chose to design a first-person wizard combat game.{{cite web|url=http://www.polygon.com/2014/2/3/5373148/turtle-rock-studio-heads-discuss-conception-of-left-4-dead-and-evolve|title=Turtle Rock Studio heads discuss conception of Left 4 Dead and Evolve|first=Jenna|last=Pitcher|work=Polygon|date=February 3, 2014|access-date=August 18, 2015|archive-url=https://web.archive.org/web/20150924154037/http://www.polygon.com/2014/2/3/5373148/turtle-rock-studio-heads-discuss-conception-of-left-4-dead-and-evolve|archive-date=September 24, 2015|url-status=live}}

As the team had developed only competitive multiplayer games before, they wanted to design a game that encouraged and supported co-operative gameplay between players; a game that would allow family and friends to play together instead of against each other, citing Secret of Mana as an example.{{cite web|url=https://venturebeat.com/2014/05/22/why-the-developers-behind-left-4-dead-and-evolve-love-making-co-op-games/|title=Why the developers behind Left 4 Dead and Evolve love making co-op games|first=Giancarlo|last=Valdes|date=May 22, 2014|access-date=August 18, 2015|work=VentureBeat|archive-url=https://web.archive.org/web/20151119023323/http://venturebeat.com/2014/05/22/why-the-developers-behind-left-4-dead-and-evolve-love-making-co-op-games/|archive-date=November 19, 2015|url-status=live}} The team decided to use source code from Counter-Strike to develop a mod called Terror-Strike,{{cite web|url=http://www.1up.com/features/left-4-dead-afterthoughts|title=Left 4 Dead Afterthoughts|work=1UP.com|first=Thierry|last=Nguyen|access-date=August 16, 2015|archive-url=https://web.archive.org/web/20160305142040/http://www.1up.com/features/left-4-dead-afterthoughts|archive-date=March 5, 2016|url-status=dead}} which is a scenario where players fight against bots, which are equipped only with knives and act like zombies. They also changed the texture of the game to create a gritty, dark atmosphere. It was not conceived as a full-budget project at that time. Meanwhile, the wizard combat game was scrapped as the team considered the project over-complicated and "geeky"; they decided to use the cancelled project as a prototype to work on the zombie game. The idea of developing a zombie game grew after the team watched 28 Days Later, a critically acclaimed zombie film. The film helped the team brainstorm ideas for their zombie game. After that, the team decided to remove all the Counter-Strike content and started developing the zombie game, in which players have to plant zombie bait and kill all the zombies present in the level. The focus later shifted to evacuating and surviving in a zombie-infested area. The project was later presented to Valve, which helped the game's funding and publishing. The project's name was Left 4 Dead, and its development began in 2005. The title was announced on November 20, 2006, and was released in November 2008 for Microsoft Windows and the Xbox 360.

On January 10, 2008, before the release of Left 4 Dead, Valve announced that it had purchased Turtle Rock in an effort to expand the company's console market. Gabe Newell, founder and president of Valve, added that it was an easy decision for the company to make, as they had high expectations for Left 4 Dead and considered themselves having a long-term relationship with Turtle Rock.{{cite web|url=http://www.gamespot.com/articles/valve-purchases-turtle-rock-studios/1100-6184544/|title=Valve purchases Turtle Rock Studios|date=January 10, 2008|access-date=August 16, 2015|work=GameSpot|archive-url=https://web.archive.org/web/20151201045245/http://www.gamespot.com/articles/valve-purchases-turtle-rock-studios/1100-6184544/|archive-date=December 1, 2015|url-status=live}} After being acquired by Valve, Turtle Rock served as Valve's in-house satellite development team, and was renamed Valve South.

With the establishment of Valve South, nine to eleven employees moved to work at Valve's headquarters in Seattle. After their departure, Valve felt that the size of the team at Valve South was too small to allow it to operate as a triple A studio,{{cite magazine|url=https://www.gameinformer.com/b/news/archive/2010/03/17/turtle-rock-returns-from-the-dead.aspx|title=Turtle Rock Returns From The Dead|first=Tim|last=Turi|magazine=Game Informer|date=March 17, 2010|access-date=August 16, 2015|archive-url=https://web.archive.org/web/20150924063958/http://www.gameinformer.com/b/news/archive/2010/03/17/turtle-rock-returns-from-the-dead.aspx|archive-date=September 24, 2015|url-status=live}} and that coordination between the two studios was difficult as they were physically far apart from each other.{{cite web|url=http://www.eurogamer.net/articles/2014-02-11-why-turtle-rock-left-valve|title=Why Turtle Rock left Valve|first=Martin|last=Robinson|work=Eurogamer|date=November 2, 2014|access-date=August 17, 2015|archive-url=https://web.archive.org/web/20150811190412/http://www.eurogamer.net/articles/2014-02-11-why-turtle-rock-left-valve|archive-date=August 11, 2015|url-status=live}} Meanwhile, Turtle Rock felt that the team's communication with Valve was lacking, and they were dissatisfied with Valve and the slow progression of projects. As a result, Newell proposed that Turtle Rock to be split from Valve, and that Valve South be shut down after the shipment of Left 4 Dead. Valve retained the rights to the Left 4 Dead franchise, while allowing the name "Turtle Rock" and its logo to be used again by the original team. This news was later confirmed by Doug Lombardi of Valve on June 3, 2009.{{cite news|first=Chris|last=Remo|title=E3: Valve's Lombardi on What Happened To Turtle Rock|date=June 3, 2009|publisher=Gamasutra|url=http://www.gamasutra.com/php-bin/news_index.php?story=23913|access-date=June 3, 2009|archive-url=https://web.archive.org/web/20120511174904/http://www.gamasutra.com/php-bin/news_index.php?story=23913|archive-date=May 11, 2012|url-status=dead}}

After being formally closed, the remaining team members including Ashton and Robb decided to restart Turtle Rock as an independent company{{cite web|url=http://www.gamespot.com/articles/left-4-dead-developer-talks-about-why-it-split-from-valve/1100-6417685/|title=Left 4 Dead developer talks about why it split from Valve|first=Martin|last=Gaston|work=GameSpot|date=February 12, 2014|access-date=August 17, 2015|archive-url=https://web.archive.org/web/20160322031454/http://www.gamespot.com/articles/left-4-dead-developer-talks-about-why-it-split-from-valve/1100-6417685/|archive-date=March 22, 2016|url-status=live}} on March 17, 2010.{{cite magazine|url=http://www.develop-online.net/news/ex-valve-studio-turtle-rock-makes-comeback/0106505|title=Ex-Valve studio Turtle Rock makes comeback|first1=Stuart|last1=Richardson|first2=Rob|last2=Crossley|work=Develop|date=March 17, 2010|access-date=August 16, 2015|archive-url=https://web.archive.org/web/20150923225012/http://www.develop-online.net/news/ex-valve-studio-turtle-rock-makes-comeback/0106505|archive-date=September 23, 2015|url-status=live}} On the same day, Turtle Rock Studios put up a new website announcing they had reformed and were once again working on video games. They released an iPhone automotive maintenance app named Garage Buddy and began hiring for a full-scale project.{{cite web|url=https://www.gamedeveloper.com/game-platforms/new-turtle-rock-studios-game-in-the-works|title=New Turtle Rock Studios Game in the Works|author=Chris Remo|work=Gamasutra|date=March 17, 2010|access-date=February 11, 2015|archive-url=https://web.archive.org/web/20150211122509/http://www.gamasutra.com/view/news/27712/New_Turtle_Rock_Studios_Game_In_The_Works.php|archive-date=February 11, 2015|url-status=live}} Upon the company's reestablishment, Booth left the company, and Robb and Ashton were requested to share the position of studio head. Ashton initially declined it, but eventually accepted and partnered with Robb to lead the studio. Both of them considered themselves developers not managers, and they found the task of running Turtle Rock a tough challenge. At that time, there were about 13 staff members in the studio. The team later rented a warehouse and re-designed it to accommodate them.

Despite being shut down by Valve, Turtle Rock still maintained a relatively close working relationship with it.{{cite web|url=http://www.pcgamer.com/turtle-rock-still-likes-valve-could-go-back-to-left-4-dead/|title=Turtle Rock still likes Valve, could go back to Left 4 Dead|first=Emanuel|last=Maiberg|date=February 3, 2015|access-date=August 17, 2015|work=PCGamer|archive-url=https://web.archive.org/web/20150924180929/http://www.pcgamer.com/turtle-rock-still-likes-valve-could-go-back-to-left-4-dead/|archive-date=September 24, 2015|url-status=live}} The studio was contracted by Valve to work on the post-launch content for Left 4 Dead and its sequel Left 4 Dead 2, which was developed in-house by Valve, and worked on Counter-Strike: Global Offensive during its early phase of development. Eventually, the studio decided to split away from the two franchises to work on something new. On June 2, 2010, Turtle Rock Studios announced the formation of a new division within Turtle Rock called Turtle Rock Garage, a small division based solely on casual games.{{cite news | title=Turtle Rock Garage | date=June 2, 2010 | publisher=Turtle Rock Studios | url=http://www.turtlerockgarage.com/news.asp?article=1 | access-date=August 21, 2015 | archive-url=https://web.archive.org/web/20160304132926/http://www.turtlerockgarage.com/news.asp?article=1 | archive-date=March 4, 2016 | url-status=live }} On September 22, 2010, Digital Development Management announced they were representing Turtle Rock Studios to find publishers for their games.{{cite news | first=Kyle | last=Orland | title=Developer Agency DDM Launches Publisher, Investor Division | date=September 22, 2010 | work=Gamasutra | url=https://www.gamedeveloper.com/game-platforms/developer-agency-ddm-launches-publisher-investor-division | access-date=September 22, 2010 | archive-url=https://web.archive.org/web/20120511190200/http://www.gamasutra.com/view/news/30563/Developer_Agency_DDM_Launches_Publisher_Investor_Division.php | archive-date=May 11, 2012 | url-status=live }}

{{quotebox|quote=For us this is a big deal, this is our proving ground. We are not just Valve's bitch. I feel for the past 20 years we've been having to prove ourselves over and over. So here we are again, trying to prove ourselves.|width=33%|source = – Phil Robb, co-founder of Turtle Rock on Evolve}}

The concept of their next project had begun prior to the development of Left 4 Dead. Inspired by the asymmetrical mode of Left 4 Dead,{{cite web|url=http://www.digitaltrends.com/gaming/evolve-turtle-rock-way/|title=For Turtle Rock Studio, Evolve Isn't Just A Game, It's A Mantra|first=Russ|last=Pitts|work=DigitalTrends|date=October 10, 2014|access-date=August 17, 2015|archive-url=https://web.archive.org/web/20150908033054/http://www.digitaltrends.com/gaming/evolve-turtle-rock-way/|archive-date=September 8, 2015|url-status=live}} and hunting games like Cabela's Big Game Hunter, the team wanted to create a game where prey could strike back at hunters.{{cite web|url=http://www.shacknews.com/article/88006/evolve-origin-of-a-species|title=Evolve: Origin of a Species|first=Steve|last=Watts|work=Shacknews|date=August 17, 2015|access-date=August 17, 2015|archive-url=https://web.archive.org/web/20150924123752/http://www.shacknews.com/article/88006/evolve-origin-of-a-species|archive-date=September 24, 2015|url-status=live}} The concept eventually became Evolve, and was the company's next full-scale project. Turtle Rock pitched the game to multiple publishers including Valve. Most of them were not supportive of the idea of an asymmetrical multiplayer video game; Valve was also not interested in the project. These companies thought that Turtle Rock was too small to handle a Triple-A project.{{cite web|url=http://www.mcvuk.com/news/read/evolve-or-die-turtle-rock-s-bid-to-prove-it-can-move-out-of-valve-s-shadow/0128362|title=Evolve or die: Turtle Rock's bid to move out of Valve's shadow|first=Christopher|last=Drung|work=MCVUK|date=February 19, 2014|access-date=August 17, 2015|archive-url=https://web.archive.org/web/20151211040027/http://www.mcvuk.com/news/read/evolve-or-die-turtle-rock-s-bid-to-prove-it-can-move-out-of-valve-s-shadow/0128362|archive-date=December 11, 2015|url-status=dead}} Publisher THQ decided to accept the game and help with its funding. THQ's then president Danny Bilson and Jason Rubin were very enthusiastic about the idea of having an asymmetrical multiplayer game like Evolve. Rubin once hoped that Turtle Rock could develop a free-to-play business model for the game. This idea was later scrapped, and resulted in some significant changes in terms of the game's gameplay and cast. On May 26, 2011, THQ announced they would be publishing Turtle Rock's next major title.{{cite web|last=Cullen|first=Johnny|title=THQ to publish Turtle Rock's newest title in 2013|url=http://www.vg247.com/2011/05/26/thq-to-publish-turtle-rocks-newest-title-in-2013/|work=VG247|date=May 26, 2011|access-date=September 19, 2015|archive-url=https://web.archive.org/web/20131021050517/http://www.vg247.com/2011/05/26/thq-to-publish-turtle-rocks-newest-title-in-2013/|archive-date=October 21, 2013|url-status=live}} On June 10, 2011, THQ described Turtle Rock's next title as "wild".{{cite web|last=Yin-Poole|first=Wesley|title=Left 4 Dead creator's new FPS is "wild"|url=http://www.eurogamer.net/articles/2011-06-10-left-4-dead-creators-new-fps-is-wild|work=Eurogamer|date=June 10, 2011|access-date=September 19, 2015|archive-url=https://web.archive.org/web/20150923183437/http://www.eurogamer.net/articles/2011-06-10-left-4-dead-creators-new-fps-is-wild|archive-date=September 23, 2015|url-status=live}}

At that time, THQ had already been in a financial crisis that had begun in 2010, and declared bankruptcy on December 19, 2012.{{cite web|url=http://www.pcgamer.com/thq-bankruptcy/|title=THQ declares bankruptcy, will continue publishing duties|first=Omri|last=Petitte|date=December 19, 2012|access-date=August 17, 2015|work=PC Gamer|archive-url=https://web.archive.org/web/20150924180622/http://www.pcgamer.com/thq-bankruptcy/|archive-date=September 24, 2015|url-status=live}} Their game, Evolve, was listed, alongside other unannounced titles from: Relic Entertainment, Vigil Games, and THQ Studios Montreal in court documents filed by THQ.{{cite web|url=http://www.ign.com/articles/2012/12/20/thq-documents-reveal-unannounced-games|title=THQ Documents Reveal Unannounced Games|first=Andrew|last=Goldfarb|work=IGN|date=December 19, 2012|access-date=August 17, 2015|archive-url=https://web.archive.org/web/20150715001853/http://www.ign.com/articles/2012/12/20/thq-documents-reveal-unannounced-games|archive-date=July 15, 2015|url-status=live}} With THQ unable to continue its publishing and funding roles, an auction was held for other publishers to acquire these titles. Publishers interested in the game visited Turtle Rock Studio to see their "secret project". The company's founders felt frustrated, and Rubin later suggested that Turtle Rock bid $250,000 for its own project, which Ashton described as "what [they] had in the bank". However, they were outbid by Take-Two Interactive, which paid $11 million to acquire the game and to secure the rights to the entire franchise.{{cite web|url=https://venturebeat.com/2013/01/23/thq-auction-turtle-rock-evolve-11-million/|title=Turtle Rock Studios outbid for its own game: Take 2 thinks it's worth $11M|first=Jeff|last=Grubb|work=VentureBeat|date=January 23, 2013|access-date=August 17, 2015|archive-url=https://web.archive.org/web/20150615184044/http://venturebeat.com/2013/01/23/thq-auction-turtle-rock-evolve-11-million/|archive-date=June 15, 2015|url-status=live}} According to Turtle Rock, they were "super excited" to work with Take-Two.{{cite web|url=https://venturebeat.com/2013/01/28/evolve-developer-super-excited-to-work-with-2k-games/|title=From the ashes of THQ: Left 4 Dead developer 'super excited' to work with 2K Games (exclusive interview)|first=Jeff|last=Grubb|work=VentureBeat|date=January 28, 2013|access-date=August 17, 2015|archive-url=https://web.archive.org/web/20150926001154/http://venturebeat.com/2013/01/28/evolve-developer-super-excited-to-work-with-2k-games/|archive-date=September 26, 2015|url-status=live}} The game was set to be published under Take-Two's publishing label 2K Games, and was introduced on January 7, 2014 by gaming magazine Game Informer.{{cite web|url=http://www.ign.com/articles/2014/01/07/left-4-dead-creators-turtle-rock-unveil-evolve|title=Left 4 Dead Creators Turtle Rock Unveil Evolve|first=Luke|last=Karmali|date=January 7, 2014|access-date=August 17, 2015|work=IGN|archive-url=https://web.archive.org/web/20150924213617/http://www.ign.com/articles/2014/01/07/left-4-dead-creators-turtle-rock-unveil-evolve|archive-date=September 24, 2015|url-status=live}} During the game's development, the team's size expanded to 75 staff members.{{cite magazine|url=http://www.develop-online.net/interview/the-evolution-of-turtle-rock-studios/0189078|title=The evolution of Turtle Rock Studios|work=Develop|date=February 11, 2014|access-date=August 21, 2015|archive-url=https://web.archive.org/web/20150923214302/http://www.develop-online.net/interview/the-evolution-of-turtle-rock-studios/0189078|archive-date=September 23, 2015|url-status=live}} Originally the game was to be released in October 2014, however 2K later delayed the release date to allow Turtle Rock to further polish the game. Evolve was released worldwide on February 10, 2015, for Microsoft Windows, PlayStation 4, and Xbox One platforms.{{cite web|url=http://www.gamespot.com/articles/evolve-delayed-until-2015-after-being-positioned-a/1100-6421528/|title=Evolve Delayed Until 2015 After Being Positioned as 2014's "Defining" Xbox One/PS4 Game|first=Chris|last=Pereira|date=August 5, 2015|access-date=August 17, 2015|work=GameSpot|archive-url=https://web.archive.org/web/20150829094512/http://www.gamespot.com/articles/evolve-delayed-until-2015-after-being-positioned-a/1100-6421528/|archive-date=August 29, 2015|url-status=live}} While Evolve received generally positive reviews, the player base quickly dwindled.{{cite web|url=https://www.pcgamer.com/evolve-looks-to-boost-dwindling-player-base-with-free-weekend/|title=Evolve looks to boost dwindling player base with free weekend|first=Andy|last=Chalk|work=PC Gamer|date=August 31, 2015|access-date=December 17, 2020}} The PC version briefly transitioned to become a free-to-play title, but 2K ultimately decided to end the game's support.{{cite web|url=https://www.gameinformer.com/b/news/archive/2016/10/25/turtle-rock-ending-support-for-evolve-stage-2-update-likely-not-coming-to-consoles.aspx|title=Turtle Rock Ending Support For Evolve, Stage 2 Update Likely Not Coming To Consoles|first=Kyle|last=Hilliard|work=PC Gamer|date=October 25, 2016|access-date=November 4, 2016|archive-url=https://web.archive.org/web/20161029110254/http://www.gameinformer.com/b/news/archive/2016/10/25/turtle-rock-ending-support-for-evolve-stage-2-update-likely-not-coming-to-consoles.aspx|archive-date=October 29, 2016|url-status=live}}

In December 2016, Turtle Rock announced that the company was working on a new intellectual property to be published by Perfect World Entertainment.{{cite web|url=http://www.pcgamer.com/evolve-dev-turtle-rock-hires-for-new-project/?|title=Evolve dev Turtle Rock hires for new project|first=Angus|last=Morrison|work=PC Gamer|date=May 5, 2016|access-date=May 5, 2016|archive-url=https://web.archive.org/web/20160507222008/http://www.pcgamer.com/evolve-dev-turtle-rock-hires-for-new-project/|archive-date=May 7, 2016|url-status=live}}{{cite web|url=http://www.gamesindustry.biz/articles/2016-12-12-turtle-rock-aaa-boxed-product-not-a-welcome-home-for-indies|title=Turtle Rock: AAA boxed product "not a welcome home" for indies|first=James|last=Brightman|date=December 13, 2016|access-date=August 17, 2017|work=Gameindustry.biz|archive-url=https://web.archive.org/web/20170817083620/http://www.gamesindustry.biz/articles/2016-12-12-turtle-rock-aaa-boxed-product-not-a-welcome-home-for-indies|archive-date=August 17, 2017|url-status=live}} The studio would also consider releasing titles via Steam's early access program, which allows players to provide feedback on unfinished games or products as they are being developed.{{cite web|url=http://www.gamasutra.com/view/news/219211/Evolve_studio_Turtle_Rock_eyes_Early_Access_development.php|title=Evolve studio Turtle Rock eyes Early Access development|first=Kris|last=Graft|work=Gamasutra|date=June 13, 2014|access-date=August 17, 2015|archive-url=https://web.archive.org/web/20150804081430/http://www.gamasutra.com/view/news/219211/Evolve_studio_Turtle_Rock_eyes_Early_Access_development.php|archive-date=August 4, 2015|url-status=dead}} However, Turtle Rock later revealed that the game had been cancelled and that both studios agreed to part ways.{{cite web|url=https://arstechnica.com/gaming/2019/03/left-4-deads-developers-are-back-4-blood-with-new-spiritual-successor/|title=Left 4 Dead's developers are Back 4 Blood with new spiritual successor|first=Kyle|last=Orland|work=Ars Technica|date=March 14, 2019|access-date=December 17, 2020}} The studio experimented with several virtual reality titles, while working with Warner Bros. Interactive Entertainment on Back 4 Blood, a new zombie co-op FPS in the vein of Left 4 Dead, which released for Windows, PlayStation 4, PlayStation 5, Xbox One and Xbox Series X/S on October 12, 2021.{{Cite web|last=Yin-Poole|first=Wesley|date=2021-03-25|title=Back 4 Blood delayed to October 2021|url=https://www.eurogamer.net/articles/2021-03-25-back-4-blood-delayed-to-october-2021|access-date=2021-05-27|website=Eurogamer|language=en}}

Slamfire Inc., the parent company of Turtle Rock Studios, was acquired by Tencent in December 2021 for undisclosed terms. The studio will remain autonomous under Tencent's ownership.{{cite web|url=https://www.businesswire.com/news/home/20211217005008/en/|title=Tencent Acquires Turtle Rock Studios|website=Business Wire|date=December 17, 2021|accessdate=December 17, 2021}}{{Cite web |title=Tencent is acquiring Back 4 Blood developer Turtle Rock Studios |url=https://www.theverge.com/2021/12/17/22841389/tencent-acquires-slamfire-turtle-rock-studios-back-4-blood |website=The Verge|date=December 17, 2021 }}

Turtle Rock Studios is best known for their work on Valve's Counter-Strike and Left 4 Dead franchises. Works include:

Left 4 Dead is a first-person shooter survival horror video game released in November 2008 for Microsoft Windows and Xbox 360. Valve led the game's development, with assistance provided by Turtle Rock.{{cite web|url=http://www.vg247.com/2014/02/12/left-4-dead-never-would-have-happened-without-turtle-rock-says-co-founder/|title=Left 4 Dead "never would have happened" without Turtle Rock, says co-founder|first=Stephany|last=Nunneley|date=February 12, 2014|access-date=August 18, 2015|work=VG247|archive-url=https://web.archive.org/web/20150906175041/http://www.vg247.com/2014/02/12/left-4-dead-never-would-have-happened-without-turtle-rock-says-co-founder/|archive-date=September 6, 2015|url-status=live}} It puts emphasis on co-operative gameplay, in which players must fight against zombies in order to complete levels.{{cite web|url=http://www.gamasutra.com/view/feature/6235/why_left_4_dead_works.php?print=1|title=Why Left 4 Dead Works|first1=Paul|last1=Goodman|first2=Adams|last2=Greenwood-Ericksen|work=Gamasutra|access-date=August 18, 2015|archive-url=https://web.archive.org/web/20150924125119/http://www.gamasutra.com/view/feature/6235/why_left_4_dead_works.php?print=1|archive-date=September 24, 2015|url-status=dead}} In addition, the game features a mode called Versus mode, in which a team of four players play as the survivors who compete against a team of four players who play as the special infected characters such as the Smoker, Hunter, Boomer and Tank. The game alternates the rounds per stage making each team of four play both the survivor characters and the special infected characters.{{cite web|url=https://www.engadget.com/2008/10/17/joystiq-hands-on-left-4-deads-versus-mode/|title=Joystiq hands-on: Left 4 Dead's versus mode|first=Randy|last=Nelson|work=Joystiq|date=October 17, 2008|access-date=August 18, 2015|archive-url=https://web.archive.org/web/20150924041831/http://www.engadget.com/2008/10/17/joystiq-hands-on-left-4-deads-versus-mode/|archive-date=September 24, 2015|url-status=live}} The game was built atop the most advanced version of the Source Engine available at the time and introduced version 2 of Turtle Rock's AI technology, which had since been updated from the AI used for the bots in Condition Zero. The game was released on Microsoft Windows and the Xbox 360 in November 2008.{{cite magazine|url=http://www.gamesradar.com/making-left-4-dead/|title=The Making Of... Left 4 Dead|magazine=Edge|date=April 27, 2015|access-date=September 19, 2015|archive-url=https://web.archive.org/web/20150501014621/http://www.gamesradar.com/making-left-4-dead/|archive-date=May 1, 2015|url-status=live}} The game received critical acclaim. The PC version of the game received an 89 out of 100 from Metacritic, a review aggregator.{{cite web|url=https://www.metacritic.com/game/left-4-dead/critic-reviews/?platform=pc|title=Left 4 Dead for PC critic reviews|work=Metacritic|publisher=CBS Interactive|access-date=August 18, 2015|archive-url=https://web.archive.org/web/20151025191048/http://www.metacritic.com/game/pc/left-4-dead|archive-date=October 25, 2015|url-status=live}} The title was thought to have redefined co-operative gameplay.{{cite magazine|url=https://www.gameinformer.com/b/features/archive/2015/04/12/the-essentials-left-4-dead.aspx|title=The Essentials – Left 4 Dead|first=Jeff|last=Marchiafava|magazine=Game Informer |date=April 12, 2015|access-date=August 18, 2015|archive-url=https://web.archive.org/web/20150911124454/http://www.gameinformer.com/b/features/archive/2015/04/12/the-essentials-left-4-dead.aspx|archive-date=September 11, 2015|url-status=live}} The success of Left 4 Dead led Valve to develop Left 4 Dead 2, the next installment in the series. Alongside its sequel, the franchise had collectively sold 12 million copies as of October 1, 2012.{{cite web|url=http://www.gamespot.com/articles/left-4-dead-series-sales-hit-12-million/1100-6397450/|title=Left 4 Dead series sales hit 12 million|first=Eddie|last=Makuch|work=GameSpot|date=October 1, 2012|access-date=August 18, 2015|archive-url=https://web.archive.org/web/20141116231531/http://www.gamespot.com/articles/left-4-dead-series-sales-hit-12-million/1100-6397450/|archive-date=November 16, 2014|url-status=live}}

Evolve was Turtle Rock's next major project after Left 4 Dead. Published by 2K Games and powered by CryEngine 3, the title is an asymmetrical multiplayer game which pits four players, who play as hunters in a first-person perspective, against a player who plays as a monster in a third-person view.{{cite magazine|url=https://www.gameinformer.com/b/features/archive/2014/01/22/why-evolve-is-not-just-another-first-person-shooter.aspx|title=Why Evolve Is Not Just Another First-Person Shooter|first=Ben|last=Hanson|magazine=Game Informer|date=January 22, 2014|access-date=August 18, 2015|archive-url=https://web.archive.org/web/20150924052135/http://www.gameinformer.com/b/features/archive/2014/01/22/why-evolve-is-not-just-another-first-person-shooter.aspx|archive-date=September 24, 2015|url-status=live}} An alpha version of the game was released on January 15, 2015.{{cite web|url=http://www.gamespot.com/articles/evolve-xbox-one-open-beta-starts-next-month-offlin/1100-6424290/|title=Evolve Xbox One Open Beta Starts Next Month, Offline Mode Revealed|first=Eddie|last=Makuch|work=GameSpot|date=December 18, 2014|access-date=August 18, 2015|archive-url=https://web.archive.org/web/20150203060751/http://www.gamespot.com/articles/evolve-xbox-one-open-beta-starts-next-month-offlin/1100-6424290/|archive-date=February 3, 2015|url-status=live}} The full version was released on February 10, 2015 for Microsoft Windows, PlayStation 4 and Xbox One. While the game received generally positive reviews,{{cite web|url=https://www.metacritic.com/game/evolve/critic-reviews/?platform=pc|title=Evolve for PC critic reviews|work=Metacritic|access-date=August 18, 2015|archive-url=https://web.archive.org/web/20150214090130/http://www.metacritic.com/game/pc/evolve|archive-date=February 14, 2015|url-status=live}} its extensive list of downloadable content available at launch caused controversy.{{cite web|url=http://www.vg247.com/2015/01/15/evolve-dev-explains-the-studios-dlc-strategy/|title=Evolve dev explains the studio's DLC strategy|first=Sherif|last=Saed|work=VG247|date=January 15, 2015|access-date=August 18, 2015|archive-url=https://web.archive.org/web/20150805170502/http://www.vg247.com/2015/01/15/evolve-dev-explains-the-studios-dlc-strategy/|archive-date=August 5, 2015|url-status=live}} Nevertheless, the game shipped 2.5 million copies as of May 18, 2015,{{cite web|url=http://www.gamespot.com/articles/evolve-ships-2-5-million-copies-publisher-calls-it/1100-6427427/|title=Evolve Ships 2.5 Million Copies, Publisher Calls It "Key Long-Term Franchise|first=Eddie|last=Makuch|work=GameSpot|date=May 18, 2015|access-date=August 18, 2015|archive-url=https://web.archive.org/web/20150520215232/http://www.gamespot.com/articles/evolve-ships-2-5-million-copies-publisher-calls-it/1100-6427427/|archive-date=May 20, 2015|url-status=live}} and was considered as another "permanent IP" by owner Take-Two Interactive.{{cite web|url=http://www.ign.com/articles/2015/05/29/evolve-will-be-another-permanent-ip-for-take-two|title=Evolve Will Be "Another Permanent IP" for Take-Two|first=Alex|last=Osborn|work=IGN|date=May 29, 2015|access-date=August 18, 2015|archive-url=https://web.archive.org/web/20150815182150/http://www.ign.com/articles/2015/05/29/evolve-will-be-another-permanent-ip-for-take-two|archive-date=August 15, 2015|url-status=live}} Evolve became a free-to-play game in July 2016.{{cite web|url=http://www.eurogamer.net/articles/2016-07-09-evolve-player-count-increases-15-930-per-cent-after-going-f2p|title=Evolve player count increases 15,930 per cent after going F2P|first=Jeffery|last=Matulef|work=Eurogamer|date=July 9, 2016|access-date=July 9, 2016|archive-url=https://web.archive.org/web/20160710145059/http://www.eurogamer.net/articles/2016-07-09-evolve-player-count-increases-15-930-per-cent-after-going-f2p|archive-date=July 10, 2016|url-status=live}} On September 3, 2018, Evolve's dedicated servers shut down.{{Cite web|url=https://support.2k.com/hc/en-us/articles/360004104913-An-important-announcement-about-Evolve|title=An important announcement about Evolve|website=2K Support|language=en-US|access-date=2018-11-04|archive-url=https://web.archive.org/web/20181105012500/https://support.2k.com/hc/en-us/articles/360004104913-An-important-announcement-about-Evolve|archive-date=November 5, 2018|url-status=live}}

Turtle Rock announced Back 4 Blood in March 2019. Though inspired by Valve's Left 4 Dead games, Back 4 Blood is a wholly original intellectual property, though still sees players working cooperatively to fight through a zombie apocalypse. The game also has a player-versus-player mode. The game was released on October 12, 2021, for Steam and Xbox Game Pass, to generally positive critical reviews but mixed public opinion. Published by Warner Bros. Interactive Entertainment for Windows, PlayStation 4, PlayStation 5, Xbox One and Xbox Series X/S.{{cite web | url = https://www.eurogamer.net/articles/2019-03-14-turtle-rock-returns-to-its-left-4-dead-roots-with-new-game-back-4-blood | title = Turtle Rock returns to its Left 4 Dead roots with Back 4 Blood | first = Wesley | last = Yin-Poole | date = March 14, 2019 | access-date = March 14, 2019 | work = Eurogamer | archive-url = https://web.archive.org/web/20190330122002/https://www.eurogamer.net/articles/2019-03-14-turtle-rock-returns-to-its-left-4-dead-roots-with-new-game-back-4-blood | archive-date = March 30, 2019 | url-status = live }}

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