Kain from the Legacy of Kain series (Soul Reaver are part of it)

Kane from the Command and Conquer series

Ganondorf (and, by extension, Ganon), the great hijacker from the Legend of Zelda series.

The Duck Hunt Dog (he's just snickering at you for reading this!)

Kreia/Darth Traya from KotOR 2. Major spoiler if you haven't played it yet, so if you want to play it sometime, please avoid looking the spoiler. 

NightlyPoe said:

Activision: hold my beer

THQ: hold my brandy

Capcom and Konami: hold our sake

Ubisoft: hold my bordeaux wine

Shitty indie devs: hold our craft beer

Paradox Interactive and CD Project RED: Whoooo, free drinks!