I would say to pick up SMS(Cause it's the best and has lots of replay value),Rent SFA(I'm still buying it. But I heard it doesn't take long to beat.)
TS2:Only if you have friends to play with.
Turok
on't buy this game it's trash.
ED:Rent or buy. It's a very inovate game that deserves to at least be rented(To bad I can't rent it).