Maybe I should update this.

You are the Man! I hear a lot about that Vampire Masquerade...is it really that good?

Postal Series
Overlord 1&2
Saints Row series
Fable series
GTA series
Evil Genius
Fallout series
God of War series
Mafia 1&2
Manhunt 1&2
KOTOR
Legacy of Kain series

**Will add more if I find more**

I guess it depends on what you're looking for in terms of evil. Some of these games you can choose to be a douche or not and murder everyone etc. Also depends if you're looking specifically for GOGs, any digital, or consoles.

Awesome, these are all good but I want to evil to be part of the main story. not just something you can do and the game wont really care that much. And anything is fine as far as consoles, pc, or whatever. As long as its nice and EVIL ;)

It is good. It is not THAT good. It's a bit too much about linear dungeon cleaning for my tastes, especially for something that claims to be an RPG. But I'm attached to it for sentimental value (the favorite game of a person who played an important role in my life), and I did enjoy it quite much myself.

Bloodlines delivered better on what I was personally expecting from Redemption. But if you don't mind linear, mostly corridor-based, missions with variety about abilities development, and some moral (endgame) consequences of which ones you use most or how you use them, then, it's amongst the best in that genre. The plot is nice too, with some cool twists, even it's got some dramatically cliché aspects, but again, it's about vampires. And the "bad" ending is totally satisfying...

Skyrim with the Dawnguard DLC. Then you can be a evil vampire lord that feed on people and also join the Dark Brotherhood that have a "god" they pray to by assassinate people.

Naughty Bear

The sequel Naughty Bear: Panic In Paradise has been released just recently.

NWN 2: Mask of the Betrayer

Give in to the curse and become an eater of souls whom even the gods themselves fear!

Well then I think I'm out of idéas. I don't usually play evil characters but if a game comes to mind and I haven't forgotten about this thread or you I'll let you know.

I wish there was a dungeon keeper 3 :(

This, or DK2, or Overlord, or Overlord 2. They're all "popcorn" fun.

You can be a right bastard in Fable and Fable 2. Fable 3 too, but it's not as fun to be evil in that one.

Protoptype: there's nothing like consuming an innocent bystander so you can continue your quest for self centered revenge.

I hear Postal/Postal II are pretty psycho, but haven't yet played them.

I'm not sure that Killing Floor isn't meant to be the same kind of deluded fever dream that Postal is supposed to be.

Someone else said God or War series, I have to agree Kratos almost certainly lacks pure motives.

Star Wars The Force Unleashed is creepy good fun being a self centered jerk that does good only by serendipitous accident (don't play 2, unless you get it practically for free, then just buy the Endor DLC for 1 dollar and drop kick Ewoks).

From what I hear you can be a right douche to other actual players in DayZ.

Hope that sets you up for some wicked good fun:)

Postal 2

I am so happy that Overlord 1 and 2 were mentioned; I LOVE those games so much. Hmm eeeeeeeevil...let's see...ontop of what's been mentioned I'd like to submit the following:

Hell Yeah! Wrath of the Dead Rabbit
Legacy of Kain: Blood Omen 2
Retro City Rampage
Cthulhu Saves the World
Star Wars: Knights of the Old Republic 1 & 2
Warhammer 40k: Dawn of War (series)
Fable 1-3
Braid

Postal 1 is evil, but nowadays it's more like a coffee break game.

I was gonna say Manhunt but you said you wanted to care about the people you kill so...