3D realms
Activision
Blizzard
Bullfrog
Capcom
Eidos
Electronic arts
Gremlin
Id software
Interplay
Ion storm
Lucasarts
Maxis
Microprose
Mindscape
Nintendo
Novalogic
Ocean
Origin
Psygnosis
Raven software
Sega
Shiny entertainment
Sierra
Ssi
Target games
Team 17
Virgin
Westwood