Just anything? And please don't mention any games where your character starts out thinking he's the good guy but turns out he's done something bad and regrets what he's done then makes up for it. And it has be in the main plot of the game that you are evil, for example in Fallout 3 as far as I can see you can't be the bad guy in the main story(please don't spoil it for me, I haven't finished it yet), what you can do is a few evil side quests and that just doesn't cut it. And the game should have no annoying fratboys, no cheesy love story, and the main character you play is as cynical and unprincipled as possible.