Can you play the game in coop?

[PJ]

Quick question, can you play this game in Coop? Or is the coop different from the main story?

[sarcastic_godot]

Yes, there's a coop mode, but not couch coop. You at least have to have a LAN set up, and two copies of the game on two different machines. (Not an issue at the current price, methinks... )

And no, the story is the same, only the baddies are a wee stronger. Your story progress, portal unlocks etc. will be saved.

[B l u e b e r r y P o p t a r t]

The story is the same single/multiplayer/co-op. You will just be a bit different than others depending on if you play with a character you've been playing with vs someone playing with a new character.