Because you like Alex Mercer in Prototype Series
Jin Kazama is a fearsome warrior torn between the darkness and the light. See them in Tekken .
A fight every now and then makes Dante's life a little more interesting. See them in Devil May Cry.
Simon Belmont is a vampire hunter bravely carrying on the family business. See them in Castlevania.
Did he ever tell you the definition of insanity? Just wait, and this psychopath will do just that. See them in Far Cry 3.
Sarah Kerrigan is pretty much the Queen Bitch of the Universe. See them in StarCraft .
A genetic experiment engineered to be the perfect assassin, Agent 47 is cold, professional, and lethal. See them in Hitman.
It's hard enough fighting a war. But it's worse for Commander Shepard, knowing no matter how hard you try, you can't save them all. See them in Mass Effect.
Driven by guilt and rage, Kratos is less a man and more an unstoppable avatar of anger and hate. See them in God of War.
Big Boss is a disillusioned mercenary commander who wants to create a world for soldiers (and soldiers alone). See them in Metal Gear Series.
Altair Ibn-La'Ahad is as much a philosopher and detective as he is a killer. He takes nothing at face value and continually searches for deeper truths. See them in Assassin's Creed Series.
Fighting for a future without fear? Yeah, Chris Redfield believes it is worth it. See them in Resident Evil Series.