Dude, mouse + keyboard is the only way to play games in general...to many commands in Crysis to probably use a controller...would be confusing.
If your not sure if you can run it, here is a nice little site...just scroll down to what game your testing your rig for.
Can You RUN It?
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X360 - Premium 20GB | X360 Games - COD4, H3, Crackdown, GoW, GH3
PC - Athlon64 4200+ X2, 2Gigs Ram, 7800GTX | OS - Windows XP, Linux Ubuntu 8.04
PC Games - WoW, BF2 (Special Forces, Euro Force, Armored Fury), Civ IV
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