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.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 | 3,149 | ||||
| 2 |
Pixel Unitedpixelunited.com
A global free-to-play mobile games business, part of Aristocrat Leisure Ltd, with a focus on building top games and driving positive change |
2,594 | |||
| 3 |
Testronictestroniclabs.com
Leaders in QA, Localization, Player Support, Compliance, and Certification for games industry Offering end-to-end Testing and QA solutions since 1998 |
1,353 | |||
| 4 |
Square Enixsquare-enix-games.com
Square Enix, Ltd develops, publishes, and distributes entertainment content in Europe, including iconic games like FINAL FANTASY and DRAGON QUEST |
909 | |||
| 5 |
Women in Gameswomeningames.org
Non-profit organization promoting fairness and equality for girls and women in the gaming industry through partnerships, events, and ambassador programs worldwide |
724 | |||
| 6 |
Jagex: The RuneScape Companyjagex.com
A leading video game developer creating long-lasting, interactive games on various platforms, with a strong focus on community engagement and player empowerment |
718 | |||
| 7 |
Sumo Digital Ltdsumo-digital.com
An award-winning game development company with 17 studios globally, creating successful games for major publishers across all platforms and genres |
708 | |||
| 8 |
Frontier Developmentsfrontier.co.uk
Independent developer and publisher of immersive, high-quality video games including management simulations and popular titles like Elite Dangerous. |
627 | |||
| 9 |
Product Madness 馃摫馃幃productmadness.com
Develops and publishes popular social casino mobile games with a global presence, focusing on player enjoyment and responsible gaming. |
617 | |||
| 10 |
Tripledot Studiostripledotstudios.com
Tripledot is a leading mobile gaming company with a global reach, creating high-quality games for millions of players worldwide |
585 | |||
| 11 |
Creative Assemblycreative-assembly.com
A premier European game development studio founded in 1987 with offices in the UK and Bulgaria, specializing in creating innovative games |
567 | |||
| 12 |
Playground Gamesplayground-games.com
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 |
547 | |||
| 13 | 544 | ||||
| 14 |
Sports Interactive (SI)sports-interactive.com
Immersive sports management simulation developer, known for BAFTA award-winning game Football Manager Part of SEGA, based in London, fostering collaboration |
534 | |||
| 15 |
Universally Speakingusspeaking.com
Providing outsourced quality assurance, localisation, and audio services for the global gaming industry with trusted, award-winning expertise. |
461 | |||
| 16 |
Double Elevendouble11.com
A top independent games publisher and developer collaborating on major IPs, specializing in porting games to different platforms |
389 | |||
| 17 |
SEGA Europesega.co.uk
Global gaming company with world-class studios creating innovative, creative experiences while fostering an inclusive, passionate, and collaborative community. |
386 | |||
| 18 |
Deep Silverdeepsilver.com
Interactive game developer and distributor focusing on high-quality products for all platforms, including popular franchises like Saints Row, Dead Island, and Metro |
382 | |||
| 19 | 355 | ||||
| 20 |
Codemastersea.com
A leading video games developer and publisher specializing in racing games, owning popular franchises like DiRT, GRID, F1, Project CARS, and Fast & Furious |
339 | |||
| 21 |
Ubisoft Reflectionsubisoft.com
A AAA game development studio in Newcastle, UK, with a 33-year legacy, creating acclaimed games like The Division, Assassins Creed, and more |
338 | |||
| 22 |
Climax Studiosclimaxstudios.com
A digital experience company with over 30 years of expertise, specializing in developing AAA console games and winning industry awards |
309 | |||
| 23 |
Rare Ltdrare.co.uk
A Midlands-based developer known for creating iconic games exclusively on Microsoft platforms, focusing on innovation, quality, and memorable gaming experiences |
269 | |||
| 24 |
Technicolor Gamestechnicolorgames.com
A global network of artists and technologists creating innovative gaming experiences through VFX, animation, and cutting-edge technologies, fueled by limitless imagination |
262 | |||
| 25 |
Games Jobs Directgamesjobsdirect.com
Independent job board connecting video game studios with global talent, promoting vacancies, increasing applications, and supporting career moves. |
260 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 26 |
Lucid Games Ltdlucidgames.co.uk
A game development company based in Liverpool, creating popular titles like Destruction AllStars and collaborating on major gaming franchises with global developers |
245 | |||
| 27 |
Gamer Networkgamer.network
A leading publisher of video game websites, trade resources, and events, with a focus on independent and community-driven content globally |
236 | |||
| 28 | 211 | ||||
| 29 |
Build A Rocket Boybuildarocketboy.com
Independent game developer with headquarters in Edinburgh and operations in multiple countries Led by Leslie Benzies, creating innovative entertainment experiences like EVERYWHERE |
208 | |||
| 30 |
Rocksteady Studios Ltdrocksteadyltd.com
A London-based videogame developer with a talented team of industry professionals creating worldclass AAA games using cutting edge technology |
204 | |||
| 31 |
Supermassive Games Ltdsupermassivegames.com
An award-winning game studio specializing in innovative storytelling titles, including popular horror games like Until Dawn and The Dark Pictures Anthology |
189 | |||
| 32 |
Electric Squareelectricsquare.com
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 |
186 | |||
| 33 |
Dovetail Gamesdovetailgames.com
Creating immersive simulation games using Unreal Engine 4, Dovetail Games offers career opportunities and a focus on work-life balance for over 140 employees |
181 | |||
| 34 |
The Multiplayer Group (MPG)themultiplayergroup.com
MPG is a development studio specializing in enhancing multiplayer games for various genres, platforms, and architectures with a skilled team of engineers and designers |
177 | |||
| 35 |
Mallconomygo.mallconomy.com
Building a community-based gamified Metaverse Shopping Mall to empower entrepreneurs in starting, building, and growing future businesses |
174 | |||
| 36 |
Wushu Studioslinktr.ee
A growing independent video game studio in the UK, pushing creative boundaries with AAA veterans, prioritizing work-life balance and team well-being |
173 | |||
| 37 |
Lighthouse Gameslighthousegames.com
A cutting-edge game development studio fostering collaboration, talent growth, and mentorship for developers to create their best work in AAA gaming |
164 | |||
| 38 |
nDreamsndreams.com
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 |
156 | |||
| 39 |
Gram Gamesgram.gs
A global mobile entertainment studio known for creating popular mobile games such as 1010!, Merge Dragons!, and Merge Farm! |
152 | |||
| 40 |
Facepunch Studiosfacepunch.com
Independent game developer based in Birmingham, UK known for creating popular Steam games like Garry鈥檚 Mod and Rust, focusing on player-first approach and community relations |
147 | |||
| 41 |
Ninja Theoryninjatheory.com
Innovative video game company creating high-quality experiences, pioneering Performance Capture, and collaborating with industry leaders in music, film, and literature |
135 | |||
| 42 |
Pixel Toyspixeltoys.com
A global developer and publisher of top digital games, specializing in creating visually stunning, immersive experiences for mobile, tablet, and VR platforms |
130 | |||
| 43 |
Third Kind Gamesthirdkindgames.com
An independent game development studio in the UK expanding globally, working with top industry names and creating exciting original IP |
128 | |||
| 44 |
Criterion Gamesea.com
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 |
124 | |||
| 45 |
FuturLabfuturlab.co.uk
An award-winning game studio creating popular games with a zero-crunch policy, committed to staff well-being and diversity and inclusion |
115 | |||
| 46 |
Ubisoft Leamingtonubisoft.com
Game development studio part of Ubisoft, with a strong team of developers in Royal Leamington Spa, UK, recruiting for growth |
101 | |||
| 47 | 101 | ||||
| 48 |
Marmalade Game Studiomarmaladegamestudio.com
A London-based game studio creates digital versions of classic board games for mobile devices, focusing on quality gameplay experiences |
90 | |||
| 49 |
Outplay Entertainment Ltdoutplay.com
Passionate team creating exceptional gaming experiences, developing award-winning titles with exceptional visual quality, promoting diversity, work-life balance, and innovation in mobile gaming |
87 | |||
| 50 |
BULKHEADbulkhead.com
An innovative UK-based company in Derby with a diverse team of over 120 members focused on creativity, innovation, and growth |
86 | |||
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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 36,548
- Multinational companies in the United Kingdom 7,458
- Financial services firms in the United Kingdom 3,711
- Financial Services companies in the United Kingdom 3,696
- Retail chains in the United Kingdom 3,289
- Professional services firms in the United Kingdom 2,706
- Software Development companies in the United Kingdom 2,600
- Manufacturers in the United Kingdom 2,159
- Companies with in-house R&D in the United Kingdom 1,930
- IT Services and IT Consulting companies in the United Kingdom 1,722
- Retail companies in the United Kingdom 1,596
- IT services companies in the United Kingdom 1,583
- Hotel and hospitality groups in the United Kingdom 1,461
- Companies with a mobile app in the United Kingdom 1,411
- Consulting firms in the United Kingdom 1,298
- E-commerce companies in the United Kingdom 1,246
- Hardware manufacturers in the United Kingdom 1,239
- Family-owned companies in the United Kingdom 1,224
- Hospitality companies in the United Kingdom 1,204
- Critical infrastructure operators in the United Kingdom 1,195
- Wellness and Fitness Services companies in the United Kingdom 1,151
- Retail Apparel and Fashion companies in the United Kingdom 1,085
- Subscription businesses in the United Kingdom 1,077
- Distributors and wholesalers in the United Kingdom 1,060