Nothing, exept that both of them are AWESOME! I downloaded all the Courage seasons and damn, what a nostalgia X) Courage is truly the best cartoon ever aired on TV. this show is filled with irony, making it even more enjoyable watching it scince i didnt understand those jokes as a kid. But why did i mix up Courage with Metro? Well, cuz Metro 2033 is the best linear game i have ever played, and sometimes the game is scary as hell. The atmosphere of the game is so original and drags you into the storyline and makes you feel like you are actually in the game. So yeah, Courage uesd to scare me as a kid, and Metro 2033 scared me now XD thats why i mixed them both together.