1. Ubisoft Montreal (PoP Sands of Time, AC, Tom Clancy, awesomeness/love them to death)
2. BioWare (obvious, Mass Effect/Kotor/everything)
3. Infinity Ward (pretty damn close to a perfect shooter)
4. Valve (Half-Life, L4D, Portal, yes)
5. Epic (Do you know just how many games use the unreal...