Wadjet Eye Games
Wanako Games
Warner Brothers
Watermelon Development
Wayforward Technology
Webfoot Technologies
Wendros
Western MicroData Enterprises
Westwood Associates
White Wolf
WiiWare
WildTangent
WinGames
Winning Eleven Productions
Wizard Works
Wizards Of The Coast
World Forge
WXP
Note: bolded names indicate companies that released a game within the last twelve months.