I say Rock'n'Roll Racing

Contra and Twisted Metal. R&R Racing might be cool as well.

Dungeon Keeper

Streets of Rage

 +1

Mechwarrior

Planescape

Bauldars Gate 

Privateer

Eye of the Beholder

Wow i like this topic! Damn where do i begin...

1) streets of rage
2) alex the kid
3) wonderboy
4) Eternal Champions (1st game with deathmoves)
5) Cool spot
6) Boogerman
7) Space Harrier
8) Chuck Rock
9) Ghost House
10) Smash TV
11) Splatterhouse
12) Powerstone
13) Comix Zone
14) Space harrier
15) A proper Shinobi / Shadow Dancer
16) Fade to Black
17) Silpheed (the one on the mega CD was by the very very best one and had the an awesome soundtrack)
18) Night Trap (remember this game on the mega cd... darn i never caught any of them having a shower :s)
19) Snatcher
20) Clockwork Knight
21) Ghost House
22) Road Rage
23) Street Racer
24) Art of Fighting
25) Another Altered beast please!!! (I know the PS2 got one, but the average reviews did not do the game justice, cuz it waz a friggin awesome game)

MediEvil

Driver
The Getaway
Crash Bandicoot made by Naughty Dog

And all should be PS3 exclusive like they all originally were, not that driver parallel lines shit that was Gamecube exclusive, and not these shitty new crash bandicoots that i've even heard may be 360 exclusive.

Jumping Flash
Vagrant Story
Wave Race
Actraiser
Ecco the Dolphin
Demon's Crest

U.N. Squadron. 'Nuff said.