No side quests. You have 4 campaigns with 5 missions each and they'll take more than an hour per for your first playthrough. 30-35 hours is a good estimate, that's why even at $40, this game was a pretty decent deal and at $20, it's a steal.
Oh wow that is a good deal. My co-op partner and i have yet to open up our BB copy. Thanks!
Edited by Donut2922, 11 February 2013 - 06:34 PM.