If the promise a co-op goodness isn't incentive enough t' pre-order Trine 2, it looks like Frozenbyte has sweetened up the deal. The game be now available for pre-purchase on Steam for $15, 'n those who take the plunge will receive access t' the multiplayer beta. The beta will include two levels, though few other details have been revealed, including when the beta will actually start. Given the game be set t' be released this December, it shouldn't be too long.