Because you like Alyx Vance in Half-Life 2

When push comes to shove, the usually overly cautious Luigi has the heart of a hero. See them in Super Mario Bros..

For Louie C.K., comedy is tough but fatherhood is even tougher. See them in Louie.

Peter Venkman's "research" projects are designed to get undergraduate students to sleep with him. Though it turns out he can bust ghosts. See them in Ghostbusters.

Tony Mendez is quietly determined and creatively resourceful. See them in Argo.

Greenpeace? No, this brave eco-terrorist is waging Greenwar. See them in Final Fantasy Series.

A loyal dinosaur, Yoshi loves both saving the day and chowing down on a good meal. See them in Super Mario Bros..

Baloo is a fun-lovin' bear who just needs the bare necessities of life See them in The Jungle Book.

Ellie is more world-weary than most 14-year-olds. You would be too if your world was infested with zombies. See them in The Last of Us.

Told her son will one day save the world, Sarah Connor dedicates her life to training him to do just that. See them in The Terminator.

Yippee-ki-yay! John McClane doesn't go down without a fight. See them in Die Hard.

Ellen Ripley defines the word "badass." When she's not leading her crew on an interstellar voyage, she's slaying terrifying creatures. See them in Alien.

A suave proprietor of an upscale nightclub and gambling den, Rick Blaine is dealing with World War II and a broken heart. See them in Casablanca.