Don't know, MGS2 doesn't really seem to have very much going on to me in terms of AI. There are never a ton of enemies etc ... I don't see what couldn't be done in that with the proper team. I think more than likely they just did a quick and dirty port and didn't really care about the game. If you take any of the teams that wrote these games originally and give them Blitz I'm confident they could recreate their own games very closely.
Now I know Blitz does not do DX9 but...
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