Game: Knights of the Old Republic
What Makes Him Bad: A once-human guy who fell to the Dark Side, who plans on destroying the Jedi Order.
What Makes Him Cool: His resemblance of a masked Kratos, and how skilled of a fighter he actually is.

Darth Malak is an apprentice Sith of Revan, and is the main antagonist in Knights of the Old Republic. Malak fell to the dark side in pursuing the Mandalorians, and becomes a Dark Lord of the Sith after betraying his master. However, Revan survives the attack, and makes it his mission to defeat the Sith, which made Malak's battle a most memorable endgame conflict.