Amourmed Core, Need for speed Underground 1 or 2, Baldurs Gate: Dark Allaince 2
Run Down:
Armoured Core- Play as mechs, customize parts such as head, legs, body, generater, weapons, colour etc.
NFSU- Racing game, customize cars with body parts, engine parts etc. Multiplayer. Online.
BG:DA2- D@D game (well, not really), fsat pace than other D & D games. Customized weapons and armour with stones. Combine stones to create diffrent effects. Multiplayer Co-OP. New Game+, character transfers (into your freinds save file for example).
There are so many other decent ones. But these are off the top of my head.