Never heard of thsee guys before, but EUR 400 is too rich for my blood for a game which may not be good. If I knew it was a classic, then maybe, but I wouldn't want preorder regret here. I kick myself enough when I get a $48 new game (Best Buy price) and it sucks.
Zeta, on the website there is a Press Start in the top right of the screen, not sure if it is there in the trailer since I only looked at screen shots, but it's gotta be co-op.