Well, you can play the game single player (which I'm doing now) and you can switch between the characters at certain spots in the game, if you want.
But you can also play the entire story with two players, i.e. co-op, where one plays Caddoc and the other E'lara. You can do this over the internet or locally with split-screen, which at some point I hope to be able to do with my brother – if he finds the time.
