| 3-Fold Games | October 2016 | 1 | 1 |
| 4J Studios | 2005 | 4 | — |
| 8floor | December 8, 2011 | 16 | 274 |
| Acclaim Studios London | 1984 | 14 | — |
| Acclaim Studios Teesside | 1988 | 2 | — |
| Acid Nerve | — | 1 | — |
| Addictive Games | 1982 | 2 | 2 |
| Adventure Soft | 1983 | 3 | 2 |
| Alligata Software Ltd. | 1982 | — | 1 |
| Alternative Software | 1985 | 2 | 5 |
| Amsoft | 1984 | — | 3 |
| Ant Workshop | — | — | 1 |
| Antimatter Games | 2013 | 1 | — |
| Apex Computer Productions | — | 2 | — |
| APriori Digital | June 28, 2013 | 2 | 2 |
| Aqua Pacific | 1999 | 2 | — |
| Arc Developments | 1984 | 1 | — |
| Argonaut Games | 1982 | 7 | — |
| Ariolasoft UK | — | — | 2 |
| Artic Software | — | 1 | 2 |
| Atomic Planet Entertainment | 2000 | 2 | — |
| Attention to Detail | 1988 | 3 | — |
| Audiogenic | 1985 | 3 | — |
| Auroch Digital | — | 7 | 1 |
| Automata UK | 1977 | — | 2 |
| Avalon Interactive | 2003 | — | 1 |
| Aviary Films | June 13, 2007 | 1 | 1 |
| Baggy Cat Entertainment | — | 1 | 1 |
| BBC Multimedia | 1995 | — | 7 |
| BBC Worldwide | 1979 | 1 | 2 |
| Beautiful Game Studios | 2003 | 4 | — |
| Bellular Studios | — | 1 | — |
| Beyond Software | 1983 | — | 2 |
| Big Head Games | May 12, 2008 | — | 1 |
| Big Red Software | 1988 | 5 | — |
| Bigbig Studios | 2001 | 1 | — |
| Bithell Games | 2013 | 3 | 2 |
| Bitmap Soft | 2019 | — | 1 |
| Bits Studios | 1984 | 2 | — |
| Bizarre Creations | 1994 | 6 | — |
| Black Rock Studio | 1998 | 9 | — |
| Blast Entertainment | — | — | 2 |
| Blazing Griffin | 2011 | 2 | 2 |
| Blitz Games | 1990 | 10 | — |
| Blitz Games Studios | 1990 | 7 | 1 |
| Blueshift Media | — | 1 | 1 |
| Bossa Studios | October 2010 | 3 | 2 |
| BossAlien | June 3, 2011 | 1 | — |
| Brain in a Jar | — | 1 | — |
| Brave At Night | January 5, 2015 | 2 | 2 |
| British Broadcasting Corporation | 1927 | — | 1 |
| Brownmonster | May 14, 2015 | 1 | 1 |
| Bullfrog Productions | 1987 | 11 | — |
| Bunnyhug | March 27, 2019 | 1 | — |
| Bytten Studio | May 17, 2019 | 1 | — |
| Canalside Studios | — | 2 | 2 |
| Cave Monsters | November 5, 2018 | 1 | 1 |
| CGA Studio Games | November 2, 2021 | 1 | — |
| Chillingo | 2002 | — | 3 |
| Cloudgine | — | 1 | — |
| Coatsink | 2009 | 3 | 7 |
| Cobra Mobile | April 7, 2005 | 2 | 2 |
| Codemasters | 1986 | 31 | 59 |
| Cohort Studios | March 2006 | 2 | — |
| ColePowered Games | 2011 | 1 | — |
| Core Design | 1988 | 12 | — |
| Cosmic Boop | August 12, 2019 | 1 | — |
| Cosmonaut Studios | 2015 | 1 | — |
| Crawfish Interactive | 1997 | 2 | — |
| Creative Assembly | August 18, 1987 | 25 | — |
| Criterion Games | 1993 | 18 | — |
| CRL Group | 1982 | 3 | 4 |
| Crytek UK | 1999 | 6 | — |
| Curve Games | December 14, 2005 | 1 | 22 |
| DAMAGE STATE | — | 1 | 1 |
| Dark Energy Digital | 1998 | 2 | 1 |
| Data Design Interactive | 1983 | 14 | 3 |
| Deadpan Games | — | 1 | — |
| Deep Silver Dambuster Studios | 2014 | 2 | — |
| Delta 4 | 1984 | 2 | — |
| Denki | 2000 | 1 | — |
| Digital Jesters | September 2003 | — | 2 |
| Domark Software | 1983 | 1 | 8 |
| Double Eleven | 2009 | 2 | 2 |
| Doublesix | 2007 | 1 | — |
| Dovetail Games | 2008 | 11 | 8 |
| Draknek Limited | February 4, 2014 | 1 | 1 |
| Dream Oni | August 12, 2019 | 1 | — |
| EA Bright Light | 1995 | 4 | — |
| Eidos Interactive | 1990 | 1 | 83 |
| Eidos Interactive | 1988 | 1 | 9 |
| EightyEight Games | January 19, 2011 | 2 | 2 |
| Electric Dreams Software | 1985 | 1 | 2 |
| Electric Square | 2015 | 2 | 1 |
| Elite Systems | 1984 | 5 | 3 |
| Elixir Studios | 1998 | 1 | — |
| Empire Interactive | 1987 | 5 | 14 |
| English Software | 1982 | — | 1 |
| Eurocom | October 1988 | 15 | — |
| Europress | 1965 | — | 3 |