[sk0g]

I agree with both of you, sorta?

The problem is, most of the major game dev companies have their own engines. Unreal Engine is massive in AAA games, but most EA titles use Frostbite, Valve: Source, Ubisoft: Anvil, Crytek: CryEngine, Bethesda: Gamebryo, and the CoD devs use IW, which is a fork of id tech engine.

However, this doesn't mean that they aren't using off-the-shelf engines. As long as you count in-house "shelves".