Why can't people get the Unreal Engine right?

[Chris Hu]

Lafiel said:

Well, I'm not sure how much modification of the U3 engine is legal, as afaik the Silicon Knights guys (Too Human devs) were sued for their modifications of the engine. So devs that use it might be stuck with what Epic can do with the PS3.

Sony themselves offer the free PhyreEngine (Journey, Demon's Souls, Grid,.. use that), but I don't know how many of their programing tricks they created for Uncharted or GoW are in there.

I think that Silicon Knight got sued for bad mouthing the engine not for the modification they made.  Im sure that there are tons of games that run on a modified version of the Unreal Engine.