# The 50 largest Computer Games companies in the United Kingdom

Tamtam tracks 186 Computer Games companies headquartered in the United Kingdom. This list ranks the 50 largest by number of employees on LinkedIn, led by Side, Pixel United and Testronic. Their median headcount is 260. Half of them were founded in 2009 or later. The most common headquarters are London (15), Cambridge (3) and Leamington Spa (3).

These United Kingdom-based computer games companies primarily focus on development and publishing across various platforms, including mobile and PC. Several firms also specialize in support services for the gaming industry, such as quality assurance, localization, and audio. The list includes both well-established studios and relatively younger companies. Many of these companies are mid-sized to large, with significant employee counts.

Notable companies include Side, which provides technical and creative solutions for game development; Pixel United, a global free-to-play mobile games business; Square Enix, known for iconic titles like FINAL FANTASY; and Jagex, creator of RuneScape. A significant concentration of these companies, including Side, Pixel United, and Square Enix, are headquartered in London, indicating a geographical cluster within the UK.

🇬🇧 United Kingdom · 50 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Side](https://www.tamtam.ai/c/side) (side.inc)<br>This company offers technical and creative solutions for video game development and services, including co-development, art, audio, QA, and localization for publishers worldwide. | Computer Games | 🇬🇧 London | 3,149 | 2009 |
| 2 | [Pixel United](https://www.tamtam.ai/c/pixel-united) (pixelunited.com)<br>A global free-to-play mobile games business, part of Aristocrat Leisure Ltd, with a focus on building top games and driving positive change | Computer Games | 🇬🇧 London | 2,594 |  |
| 3 | [Testronic](https://www.tamtam.ai/c/testronic) (testroniclabs.com)<br>Leaders in QA, Localization, Player Support, Compliance, and Certification for games industry Offering end-to-end Testing and QA solutions since 1998 | Computer Games | 🇬🇧 Croydon | 1,353 | 1998 |
| 4 | [Square Enix](https://www.tamtam.ai/c/square-enix-london) (square-enix-games.com)<br>Square Enix, Ltd develops, publishes, and distributes entertainment content in Europe, including iconic games like FINAL FANTASY and DRAGON QUEST | Computer Games | 🇬🇧 London | 909 |  |
| 5 | [Women in Games](https://www.tamtam.ai/c/women-in-games) (womeningames.org)<br>Non-profit organization promoting fairness and equality for girls and women in the gaming industry through partnerships, events, and ambassador programs worldwide | Computer Games | 🇬🇧 London | 724 | 2009 |
| 6 | [Jagex: The RuneScape Company](https://www.tamtam.ai/c/jagex-the-runescape-company) (jagex.com)<br>A leading video game developer creating long-lasting, interactive games on various platforms, with a strong focus on community engagement and player empowerment | Computer Games | 🇬🇧 Cambridge | 718 | 2001 |
| 7 | [Sumo Digital Ltd](https://www.tamtam.ai/c/sumo-digital-ltd) (sumo-digital.com)<br>An award-winning game development company with 17 studios globally, creating successful games for major publishers across all platforms and genres | Computer Games | 🇬🇧 Sheffield | 708 | 2003 |
| 8 | [Frontier Developments](https://www.tamtam.ai/c/frontier-developments) (frontier.co.uk)<br>Independent developer and publisher of immersive, high-quality video games including management simulations and popular titles like Elite Dangerous. | Computer Games | 🇬🇧 Cambridge | 627 | 1994 |
| 9 | [Product Madness 📱🎮](https://www.tamtam.ai/c/product-madness) (productmadness.com)<br>Develops and publishes popular social casino mobile games with a global presence, focusing on player enjoyment and responsible gaming. | Computer Games | 🇬🇧 London | 617 | 2007 |
| 10 | [Tripledot Studios](https://www.tamtam.ai/c/tripledot-studios) (tripledotstudios.com)<br>Tripledot is a leading mobile gaming company with a global reach, creating high-quality games for millions of players worldwide | Computer Games | 🇬🇧 London | 585 | 2017 |
| 11 | [Creative Assembly](https://www.tamtam.ai/c/creative-assembly) (creative-assembly.com)<br>A premier European game development studio founded in 1987 with offices in the UK and Bulgaria, specializing in creating innovative games | Computer Games | 🇬🇧 Horsham | 567 | 1987 |
| 12 | [Playground Games](https://www.tamtam.ai/c/playground-games) (playground-games.com)<br>Creating genre-defining video games for a global audience, with award-winning hits and a dedicated community, including the development of a new Fable game | Computer Games | 🇬🇧 Leamington Spa | 547 | 2010 |
| 13 | [Rebellion](https://www.tamtam.ai/c/rebellion) (linktr.ee)<br>A leading European multimedia studio creating iconic games like Sniper Elite and comics like 2000 AD, with expansion into film and TV | Computer Games | 🇬🇧 Oxford | 544 | 1992 |
| 14 | [Sports Interactive (SI)](https://www.tamtam.ai/c/sports-interactive-si) (sports-interactive.com)<br>Immersive sports management simulation developer, known for BAFTA award-winning game Football Manager Part of SEGA, based in London, fostering collaboration | Computer Games | 🇬🇧 Stratford | 534 | 1994 |
| 15 | [Universally Speaking](https://www.tamtam.ai/c/universally-speaking) (usspeaking.com)<br>Providing outsourced quality assurance, localisation, and audio services for the global gaming industry with trusted, award-winning expertise. | Computer Games | 🇬🇧 Wyboston | 461 | 2005 |
| 16 | [Double Eleven](https://www.tamtam.ai/c/double-eleven) (double11.com)<br>A top independent games publisher and developer collaborating on major IPs, specializing in porting games to different platforms | Computer Games | 🇬🇧 Middlesbrough | 389 | 2009 |
| 17 | [SEGA Europe](https://www.tamtam.ai/c/sega-europe) (sega.co.uk)<br>Global gaming company with world-class studios creating innovative, creative experiences while fostering an inclusive, passionate, and collaborative community. | Computer Games | 🇬🇧 London | 386 | 1951 |
| 18 | [Deep Silver](https://www.tamtam.ai/c/deep-silver) (deepsilver.com)<br>Interactive game developer and distributor focusing on high-quality products for all platforms, including popular franchises like Saints Row, Dead Island, and Metro | Computer Games | 🇬🇧 Theale | 382 |  |
| 19 | [Eneba](https://www.tamtam.ai/c/eneba) (eneba.com)<br>A fast-growing European company offering gaming and entertainment products, alternative distribution platform for game publishers, fair marketplace for sellers, and affiliate program for creators | Computer Games | 🇬🇧 London | 355 | 2018 |
| 20 | [Codemasters](https://www.tamtam.ai/c/codemasters) (ea.com)<br>A leading video games developer and publisher specializing in racing games, owning popular franchises like DiRT, GRID, F1, Project CARS, and Fast & Furious | Computer Games | 🇬🇧 Southam | 339 |  |
| 21 | [Ubisoft Reflections](https://www.tamtam.ai/c/ubisoft-reflections) (ubisoft.com)<br>A AAA game development studio in Newcastle, UK, with a 33-year legacy, creating acclaimed games like The Division, Assassins Creed, and more | Computer Games | 🇬🇧 Newcastle upon Tyne | 338 | 1984 |
| 22 | [Climax Studios](https://www.tamtam.ai/c/climax-studios) (climaxstudios.com)<br>A digital experience company with over 30 years of expertise, specializing in developing AAA console games and winning industry awards | Computer Games | 🇬🇧 Portsmouth | 309 | 1988 |
| 23 | [Rare Ltd](https://www.tamtam.ai/c/rare-ltd) (rare.co.uk)<br>A Midlands-based developer known for creating iconic games exclusively on Microsoft platforms, focusing on innovation, quality, and memorable gaming experiences | Computer Games | 🇬🇧 Twycross | 269 | 1985 |
| 24 | [Technicolor Games](https://www.tamtam.ai/c/technicolor-games) (technicolorgames.com)<br>A global network of artists and technologists creating innovative gaming experiences through VFX, animation, and cutting-edge technologies, fueled by limitless imagination | Computer Games | 🇬🇧 London | 262 |  |
| 25 | [Games Jobs Direct](https://www.tamtam.ai/c/games-jobs-direct) (gamesjobsdirect.com)<br>Independent job board connecting video game studios with global talent, promoting vacancies, increasing applications, and supporting career moves. | Computer Games | 🇬🇧 Rotherham | 260 | 2011 |
| 26 | [Lucid Games Ltd](https://www.tamtam.ai/c/lucid-games-ltd) (lucidgames.co.uk)<br>A game development company based in Liverpool, creating popular titles like Destruction AllStars and collaborating on major gaming franchises with global developers | Computer Games | 🇬🇧 Merseyside | 245 | 2011 |
| 27 | [Gamer Network](https://www.tamtam.ai/c/gamer-network) (gamer.network)<br>A leading publisher of video game websites, trade resources, and events, with a focus on independent and community-driven content globally | Computer Games | 🇬🇧 London | 236 | 1999 |
| 28 | [Hutch](https://www.tamtam.ai/c/hutch) (hutch.io)<br>Mobile gaming company focusing on racing genre, creating engaging experiences for players worldwide Award-winning culture, team-driven environment, acquired by Modern Times Group | Computer Games | 🇬🇧 London | 211 | 2011 |
| 29 | [Build A Rocket Boy](https://www.tamtam.ai/c/build-a-rocket-boy) (buildarocketboy.com)<br>Independent game developer with headquarters in Edinburgh and operations in multiple countries Led by Leslie Benzies, creating innovative entertainment experiences like EVERYWHERE | Computer Games | 🇬🇧 Edinburgh | 208 | 2016 |
| 30 | [Rocksteady Studios Ltd](https://www.tamtam.ai/c/rocksteady-studios-ltd) (rocksteadyltd.com)<br>A London-based videogame developer with a talented team of industry professionals creating worldclass AAA games using cutting edge technology | Computer Games | 🇬🇧 London | 204 |  |
| 31 | [Supermassive Games Ltd](https://www.tamtam.ai/c/supermassive-games-ltd) (supermassivegames.com)<br>An award-winning game studio specializing in innovative storytelling titles, including popular horror games like Until Dawn and The Dark Pictures Anthology | Computer Games | 🇬🇧 Guildford | 189 | 2008 |
| 32 | [Electric Square](https://www.tamtam.ai/c/electric-square) (electricsquare.com)<br>World-class game development services for top partners, specializing in AAA Character Action console co-development, full development, and VR Based in UK, Singapore, and Malta | Computer Games | 🇬🇧 Brighton | 186 | 2015 |
| 33 | [Dovetail Games](https://www.tamtam.ai/c/dovetail-games) (dovetailgames.com)<br>Creating immersive simulation games using Unreal Engine 4, Dovetail Games offers career opportunities and a focus on work-life balance for over 140 employees | Computer Games | 🇬🇧 Chatham | 181 | 2008 |
| 34 | [The Multiplayer Group (MPG)](https://www.tamtam.ai/c/the-multiplayer-group-mpg) (themultiplayergroup.com)<br>MPG is a development studio specializing in enhancing multiplayer games for various genres, platforms, and architectures with a skilled team of engineers and designers | Computer Games | 🇬🇧 Nottingham | 177 | 2018 |
| 35 | [Mallconomy](https://www.tamtam.ai/c/mallconomy) (go.mallconomy.com)<br>Building a community-based gamified Metaverse Shopping Mall to empower entrepreneurs in starting, building, and growing future businesses | Computer Games | 🇬🇧 London | 174 | 2022 |
| 36 | [Wushu Studios](https://www.tamtam.ai/c/wushu-studios) (linktr.ee)<br>A growing independent video game studio in the UK, pushing creative boundaries with AAA veterans, prioritizing work-life balance and team well-being | Computer Games | 🇬🇧 Liverpool | 173 | 2017 |
| 37 | [Lighthouse Games](https://www.tamtam.ai/c/lighthouse-games) (lighthousegames.com)<br>A cutting-edge game development studio fostering collaboration, talent growth, and mentorship for developers to create their best work in AAA gaming | Computer Games | 🇬🇧 Leamington Spa | 164 | 2023 |
| 38 | [nDreams](https://www.tamtam.ai/c/ndreams) (ndreams.com)<br>Innovative VR game developer and publisher collaborating with top partners to create award-winning titles for leading VR headsets Passionate about defining the future of VR | Computer Games | 🇬🇧 Farnborough | 156 | 2006 |
| 39 | [Gram Games](https://www.tamtam.ai/c/gram-games) (gram.gs)<br>A global mobile entertainment studio known for creating popular mobile games such as 1010!, Merge Dragons!, and Merge Farm! | Computer Games | 🇬🇧 London | 152 | 2012 |
| 40 | [Facepunch Studios](https://www.tamtam.ai/c/facepunch-studios) (facepunch.com)<br>Independent game developer based in Birmingham, UK known for creating popular Steam games like Garry’s Mod and Rust, focusing on player-first approach and community relations | Computer Games | 🇬🇧 Birmingham | 147 | 2004 |
| 41 | [Ninja Theory](https://www.tamtam.ai/c/ninja-theory) (ninjatheory.com)<br>Innovative video game company creating high-quality experiences, pioneering Performance Capture, and collaborating with industry leaders in music, film, and literature | Computer Games | 🇬🇧 Cambridge | 135 | 2004 |
| 42 | [Pixel Toys](https://www.tamtam.ai/c/pixel-toys) (pixeltoys.com)<br>A global developer and publisher of top digital games, specializing in creating visually stunning, immersive experiences for mobile, tablet, and VR platforms | Computer Games | 🇬🇧 Royal Leamington Spa | 130 | 2012 |
| 43 | [Third Kind Games](https://www.tamtam.ai/c/third-kind-games) (thirdkindgames.com)<br>An independent game development studio in the UK expanding globally, working with top industry names and creating exciting original IP | Computer Games | 🇬🇧 Leamington Spa | 128 | 2016 |
| 44 | [Criterion Games](https://www.tamtam.ai/c/criterion-games) (ea.com)<br>An award-winning game studio crafting popular racing games and collaborating on well-known titles, prioritizing creativity, diversity, and continuous learning in a supportive environment | Computer Games | 🇬🇧 Guildford | 124 |  |
| 45 | [FuturLab](https://www.tamtam.ai/c/futurlab) (futurlab.co.uk)<br>An award-winning game studio creating popular games with a zero-crunch policy, committed to staff well-being and diversity and inclusion | Computer Games | 🇬🇧 Brighton & Hove | 115 | 2003 |
| 46 | [Ubisoft Leamington](https://www.tamtam.ai/c/ubisoft-leamington) (ubisoft.com)<br>Game development studio part of Ubisoft, with a strong team of developers in Royal Leamington Spa, UK, recruiting for growth | Computer Games | 🇬🇧 Leamington Spa | 101 | 2017 |
| 47 | [TIGA](https://www.tamtam.ai/c/tiga) (tiga.org)<br>The company represents UK's games industry, with members including developers, technology companies, and universities, aiming to make UK the premier location for gaming | Computer Games | 🇬🇧 London | 101 |  |
| 48 | [Marmalade Game Studio](https://www.tamtam.ai/c/marmalade-game-studio) (marmaladegamestudio.com)<br>A London-based game studio creates digital versions of classic board games for mobile devices, focusing on quality gameplay experiences | Computer Games | 🇬🇧 London | 90 | 2016 |
| 49 | [Outplay Entertainment Ltd](https://www.tamtam.ai/c/outplay-entertainment-ltd) (outplay.com)<br>Passionate team creating exceptional gaming experiences, developing award-winning titles with exceptional visual quality, promoting diversity, work-life balance, and innovation in mobile gaming | Computer Games | 🇬🇧 Dundee | 87 | 2010 |
| 50 | [BULKHEAD](https://www.tamtam.ai/c/bulkhead) (bulkhead.com)<br>An innovative UK-based company in Derby with a diverse team of over 120 members focused on creativity, innovation, and growth | Computer Games | 🇬🇧 Derby | 86 | 2015 |

## How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 12, 2026.

## More company lists in the United Kingdom

- [The largest companies in the United Kingdom](https://www.tamtam.ai/l/largest-companies-united-kingdom) (36,548)
- [Multinational companies in the United Kingdom](https://www.tamtam.ai/l/multinational-companies-united-kingdom) (7,458)
- [Financial services firms in the United Kingdom](https://www.tamtam.ai/l/financial-services-firms-united-kingdom) (3,711)
- [Financial Services companies in the United Kingdom](https://www.tamtam.ai/l/financial-services-companies-united-kingdom) (3,696)
- [Retail chains in the United Kingdom](https://www.tamtam.ai/l/retail-chains-united-kingdom) (3,289)
- [Professional services firms in the United Kingdom](https://www.tamtam.ai/l/professional-services-firms-united-kingdom) (2,706)
- [Software Development companies in the United Kingdom](https://www.tamtam.ai/l/software-development-companies-united-kingdom) (2,600)
- [Manufacturers in the United Kingdom](https://www.tamtam.ai/l/manufacturers-united-kingdom) (2,159)
- [Companies with in-house R&D in the United Kingdom](https://www.tamtam.ai/l/r-and-d-companies-united-kingdom) (1,930)
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- [Retail companies in the United Kingdom](https://www.tamtam.ai/l/retail-companies-united-kingdom) (1,596)
- [IT services companies in the United Kingdom](https://www.tamtam.ai/l/it-services-companies-united-kingdom) (1,583)
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- [Companies with a mobile app in the United Kingdom](https://www.tamtam.ai/l/companies-with-mobile-app-united-kingdom) (1,411)
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- [Hospitality companies in the United Kingdom](https://www.tamtam.ai/l/hospitality-companies-united-kingdom) (1,204)
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- [Distributors and wholesalers in the United Kingdom](https://www.tamtam.ai/l/distributors-and-wholesalers-united-kingdom) (1,060)

## The same list elsewhere in United Kingdom

- [Computer Games companies in England](https://www.tamtam.ai/l/computer-games-companies-england) (167)
- [Computer Games companies in London](https://www.tamtam.ai/l/computer-games-companies-london) (56)

## The same list elsewhere

- [Computer Games companies in the world](https://www.tamtam.ai/l/computer-games-companies-in-the-world) (1,068)
- [Computer Games companies in Europe](https://www.tamtam.ai/l/computer-games-companies-in-europe) (759)

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Source: https://www.tamtam.ai/l/computer-games-companies-united-kingdom