I had a mate that worked on the live action sequences of that game & it was all chroma keyed against a green screen with all the settings added later on. It was done on a real shoestring budget as well, which brings us back to the topic of low budget films...oh no!!!!
Matt (who is really bored of talking about Dredd movies)
I got it on tape. (The full motion clips)
It looks quite impressive.
No, really it does!
scojo