Why don't console manufacturers create their own game engines?

[Fumanchu]

PullusPardus said:

miz1q2w3e said:

lol all of you taking PullusPardus' comment seriously, dude obviously doesn't know what he's talking about

i'm betting you actually don't know what a game engine is.

@replies. didn't Fable games run on the Havok engine? , it says so when you start the games, i don't remember the forza one though.

That's just for physics, not a game engine.  A lot of games use it.