
2K Australia Pty Ltd was an Australian video game developer based in Canberra. The company was founded as Irrational Games Australia, a subsidiary of Irrational Games, in April 2000. Irrational Games Australia and its parent were acquired by Take-Two Interactive in January 2006, with Irrational Games being placed under the 2K label. The two Irrational Games studio were split apart in August 2007, wherefore Irrational Games Australia became 2K Australia. Furthermore, 2K Australia under the name of sister studios 2K Marin between April 2010 and November 2011, and was finally shut down in April 2015.

airG Incorporated (airG) is a Canadian software company.

AlphaDream Corporation, Ltd. was a video game development company founded in 2000 by Tetsuo Mizuno in Tokyo, Japan. In partnership with Nintendo, it produced software for the Game Boy Color, Game Boy Advance, Nintendo DS, Nintendo 3DS, and Nintendo Switch, including the Mario & Luigi series. The company's staff included prominent former developers from Square, such as Chihiro Fujioka. On October 1, 2019, AlphaDream was shut down after declaring bankruptcy.

Sega AM Research & Development No. 11 , reestablished as Amusement Vision, Ltd. in 2000, was a video game development team within the Japanese multinational video game developer Sega.

Atomic Planet Entertainment Ltd or Atomic Planet was a British video game developer founded in 2000 by Darren and Jason Falcus. Previously the brothers had managed Acclaim Studios Teesside, formerly Iguana UK and Optimus Software, which closed in 2002.

BattleGoat Studios is a Canadian software developer founded in 2000. They were formed to develop the PC Game title Supreme Ruler 2010, which is a new updated version of a game concept originally developed by George Geczy in 1982, a text-based strategy video game called Supreme Ruler released for the Radio Shack TRS-80 computer.

Beenox is a video game developer established in 2000 in Quebec City, Quebec, Canada. The studio became a wholly owned subsidiary of Activision on May 25, 2005.

Big Huge Games is a video game developer located in Timonium, Maryland since 2000, known first for real-time strategy games such as Rise of Nations, later for the console RPG Kingdoms of Amalur: Reckoning, and more recently for mobile games such as DomiNations and Arcane Showdown. Throughout most of its history the company has been associated with its best-known founder, Brian Reynolds, whose prior career already included work as lead designer of Civilization II and Alpha Centauri, and co-founder of Firaxis Games. The studio's ownership has changed hands several times over the years, and it became briefly defunct in May 2012, but it was revived by Reynolds along with several original alumni and new partners. The company is presently owned by Nexon, and actively runs its mobile titles DomiNations and Arcane Showdown, while continuing to develop new games.

Budcat Creations was a video game developer based in Iowa City, Iowa, United States and was a wholly owned subsidiary of Activision, though they formerly had partnerships with Electronic Arts and Majesco Entertainment. They were largely responsible for porting titles to non-target consoles. They had worked on a number of blockbuster gaming franchises, among them Guitar Hero, Madden NFL, and Medal of Honor. They have also produced a few original titles, including Blast Works: Build, Trade, Destroy and The New York Times Crosswords.

Cavia Inc. was a Japanese video game developer. The company name was apparently an acronym for Computer Amusement Visualizer, although the company web site also claims it refers to caviar.

Cinemaware was a video game developer and publisher that released several popular titles in the 1980s based on various film themes. The company was resurrected in 2000, before being acquired by eGames in 2005.

Cryptic Studios is an American video game developer specializing in massively multiplayer online role-playing games. It is headquartered in Los Gatos, California and is a wholly owned Perfect World subsidiary.

Denki is an interactive television & console game developer based in Dundee, Scotland. The company is the developer of over 180 console and interactive television games, covering a range of platforms. Denki has worked extensively in the digital interactive television (DiTV) market, with the majority of their titles created specifically for digital interactive television DirecTV platform.

Destination Games was an American computer game development company created in April 2000 by Richard Garriott, Robert Garriott and Starr Long, following their departure from Origin Systems.

Double Fine Productions, Inc. is an American first-party video game developer of Xbox Game Studios based in San Francisco, California. Founded in July 2000 by Tim Schafer shortly after his departure from LucasArts, Double Fine's first two games – Psychonauts and Brütal Legend – underperformed publishers' expectations despite critical praise. The future of the company was assured when Schafer turned to several in-house prototypes built during a two-week period known as "Amnesia Fortnight" to expand as smaller titles, all of which were licensed through publishers and met with commercial success. Schafer has since repeated these Amnesia Fortnights, using fan-voting mechanics, to help select and build smaller titles. Double Fine is also credited with driving interest in crowdfunding in video games, having been able to raise more than US$3 million for the development of Broken Age, at the time one of the largest projects funded by Kickstarter. The company has continued to build on their independent developer status and has promoted efforts to help other, smaller independent developers through its clout, including becoming a video game publisher for these titles. Double Fine has also been able to acquire rights to remaster some of the earlier LucasArts adventure games, including Grim Fandango, Day of the Tentacle, and Full Throttle. The Double Fine website is also host to seven webcomics, which are created by members of Double Fine's art team and are collectively referred to as the Double Fine Comics.
Eugen Systems is a French video game developer based in Paris, France. It was founded in January 2000 by Alexis Le Dressay, a DPLG architect, and Cedric Le Dressay, a software engineer. The company currently focuses on developing real-time strategy games for the PC and Macintosh platforms, but also has developed games for the PlayStation 3 and Xbox 360 in the past.

Evoga Entertainment was a Mexican video game company.

Frogwares is an independent Ukrainian video game development studio headquartered in Kyiv with subsidiary offices in Dublin. The studio and its subsidiaries have developed numerous adventure games for PlayStation 4, Xbox One, Microsoft Windows, Nintendo Switch as well as PlayStation 3, Xbox 360, Nintendo DS, Nintendo 3DS, Wii, and mobile.

Frontwing Co., Ltd. is a Japanese visual novel studio that specializes in the production of adult visual novels. Its main office is located in Taito City, Tokyo. The representative producer and president is Ryūichirō Yamakawa. “Frontwing” is the company's main brand, but it has also released games under affiliated brands “Survive” (サヴァイブ), “Hotchkiss” (ホチキス), and “b-wing.” These brands have all since merged to become “Frontwing.”

G-Mode Corporation is a Japanese company that provides mobile network game contents that specialize in Java game software in Japan. It develops and distributes games for Java-compatible mobile phones. The company also licenses contents for mobile telecommunications operators, as well as involves in the original equipment manufacturing of mobile phone games.

Gamelab was an independent game studio in New York City founded by game designer Eric Zimmerman and Peter Seung-Taek Lee in 2000. It is best known for creating Diner Dash, one of the most downloaded games of all time, as well as its two spin-off companies, the non-profit Institute of Play and the online game and community site Gamestar Mechanic.

Gravity Co., Ltd. is a South Korean video game corporation primarily known for the development of the massively multiplayer online role-playing game Ragnarok Online.

Guerrilla B.V. is a Dutch first-party video game developer based in Amsterdam and part of SIE Worldwide Studios. The company was founded as Lost Boys Games in January 2000 through the merger of three smaller development studios as a subsidiary of multimedia conglomerate company Lost Boys. Lost Boys Games became independent the following year and was acquired by Media Republic in 2003, renaming the studio to Guerrilla Games before being purchased by Sony Interactive Entertainment in 2005. The company employs approximately 400 people under the leadership of joint studio heads Angie Smets, Jan-Bart van Beek, and Michiel van der Leeuw. It is best known for the Killzone and Horizon game series.

www.handy-games.com GmbH, doing business as HandyGames, is a German video game developer and publisher based in Giebelstadt. In July 2018, the company was acquired by THQ Nordic.

HB Studios is a Canadian video game developer founded in 2000 and located in Nova Scotia, Canada. They are best known for their rugby and cricket games, published by EA Sports, and more recently The Golf Club games with PGA Tour 2K21 as the latest installment.

Headstrong Games was a subsidiary of Kuju Entertainment based in London that developed video games. Headstrong Games were known for creating intellectual property such as the Art Academy series and the Battalion Wars franchise.

Helixe was an American video game developer that developed games mainly for Nintendo handhelds. The company was founded in July 2000 and was owned by THQ. It developed titles for the Game Boy Advance and Nintendo DS.

Hirameki International Group Inc. was an American company founded in March 2000 which specialized in translating visual novels from Japan and releasing them to the American market. It is named after the Japanese word for the noun "flash" or "insight". On January 2, 2008, the company elected to bow out of games production.

Hitcents is a video game publisher and mobile app and games studio, headquartered in Bowling Green, Kentucky. They are the creators of the cross-platform gaming series Draw A Stickman. In 2014, Hitcents partnered with actor Tom Hanks to develop the Hanx Writer. Founded in 1999 as a software company by twin brothers Chris and Clinton Mills, the company has grown from a small home office into a globally successful enterprise. Hitcents also has offices in Los Angeles and San Francisco.

Hooksoft is a Japanese visual novel studio known for creating adult-oriented bishōjo games. It is currently owned by Robo Planning Inc. . Hooksoft is partnered with three sister brands, The Jolly Roger (TJR), Smee, and ASa Project. In December 2008, the staff of Hook Software Creations resigned from their partnership with Inter Apparel, changed the company name to Hooksoft and became an independent visual novel maker.

KOG Co., better known as KOG Studios, is a South Korean game development company based in Daegu. They specialize in producing online free-to-play games, and currently publish the side-scrolling action MMORPG, Elsword and the early access action MMORPG, KurtzPel: Bringer of Chaos. They have also developed the game Grand Chase.
NDcube Co., Ltd. is a Japanese video game developer based in Japan with offices in Tokyo and Sapporo. NDcube is a fully owned Nintendo subsidiary.

Papaya Studio was an independent American video game developer based in Irvine, California. It was known for titles on the Xbox 360, Wii, PC, PlayStation 3, PlayStation 2, PlayStation Portable, Nintendo 3DS and Nintendo DS.

Piranha Games Inc. is a Canadian video game developer based in Vancouver, British Columbia. The company was founded by Russ Bullock, President and Executive Producer, and Bryan Ekman, VP and Creative Director. Piranha Games is one of the oldest game developers in the Vancouver area and is currently housed in the International Village Mall in the Chinatown area. On 25 November 2020, Piranha Games entered into an agreement to be acquired by Enad Global 7.

PopCap Games, Inc. is an American video game developer based in Seattle. The company was founded in 2000 by John Vechey, Brian Fiete and Jason Kapalka. It was acquired by Electronic Arts in July 2011.

Psyonix LLC is an American video game developer based in San Diego. Founded in 2000 by Dave Hagewood, the company is best known for its 2015 game Rocket League. In May 2019, Psyonix was acquired by Epic Games.

Rake In Grass is an independent video game developer based in the Czech Republic. The studio makes computer, mobile and console games. The studio was nominated for an award in artistic contribution to Czech video game output in 2012.

Sega AM Research & Development No. 1 is a development department within Japanese video game developer Sega that also previously existed as Wow Entertainment and Sega Wow Inc. AM1 spent most of its early existence under the leadership of Rikiya Nakagawa and developed a number of arcade games for Sega.

Sega AM Research & Development No. 3, known as Hitmaker Co., Ltd. from 2000 to 2004, is a defunct division of Sega, a Japanese video game company. Established by 1993, AM3 was managed by Hisao Oguchi and developed a number of arcade games for Sega. Series introduced by AM3 include Virtual On, Sega Rally, Crazy Taxi, and Virtua Tennis. AM3's main focus was on arcade games until the release of the Dreamcast. Additionally, developers Tetsuya Mizuguchi and Kenji Sasaki developed Sega Rally Championship with AM3 before departing to form AM Annex, which later split into Sega AM9 and Sega AM5.

Skip Ltd. is a Japanese video game developer that has a close relationship with Nintendo. Nintendo has published all of their Japanese releases; with the only notable exception being LOL, which skip Ltd. published independently. The company's staff includes prominent developers from Square such as Kenichi Nishi and Keita Eto. In August 2020, there were growing signs that the company may have become defunct, however this has not yet been officially confirmed.

Smilebit was a division of Japanese video game developer Sega.

Sobee is a game development company founded by Mevlüt Dinç in 2000. Sobee's main headquarters are in İstanbul, Turkey. The firm was purchased by Türk Telekom in 2009.

Sulake Oy, or Sulake, is a Finnish video game company primary known for the creation and development of Habbo and Hotel Hideaway games.

Suzak Inc. was a video game development company based in Japan. Suzak worked with Nintendo to create games based on their intellectual property, such as Wario: Master of Disguise and F-Zero Climax. They created numerous games for PlayStation 2, Game Boy Advance, and Nintendo DS.

Vicious Cycle Software was an American video game development company based in Morrisville, North Carolina.

WeMade Co., Ltd is a South Korean video game developer, based in Seoul. They are the creators of the Legend of Mir series of MMORPGs, the two most successful being The Legend of Mir 2, and its sequel The Legend of Mir 3. Legend of Mir has attracted over 120 million users in Asia, and generated over $65 million a month in revenue during its height. Even today, in its ninth year of operation, Legend of Mir 2 still generates well over $20 million a month in China alone.

Xbox Game Studios is an American video game publisher and division of Microsoft based in Redmond, Washington. It was established in March 2000, spun out from an internal Games Group, for the development and publishing of video games for Microsoft Windows. It has since expanded to include games and other interactive entertainment for the namesake Xbox platforms, Windows Mobile and other mobile platforms, and web-based portals. As the studio grew, it has acquired and relinquished ownership of several other studios, and is the parent organization of fifteen other studios.

XPEC Entertainment is a Taiwanese video game developer and publisher based in Taipei. It was founded in 2000.