WSIE Worldwide Studios
W989 Studios
WBend Studio
WBigbig Studios
WCellius
WContrail (company)
WDaybreak Game Company
WEvolution Studios
WGuerrilla Cambridge
WGuerrilla Games
WIncognito Entertainment
WLondon Studio
WMedia Molecule
WPolyphony Digital
WPsygnosis
WSan Diego Studio
WSanta Monica Studio
WSucker Punch Productions
WTeam Soho
WZipper Interactive