*Updated With New Kickass Demo* Serious Sam II Demo!
Single player, coop, all the weapons and one vehicle. Man I wish I was at home right now.
Forget that old crap, here's Croteam's demo. That other demo was shoved out the door by Take 2 at the last minute.
Seriously, it's such an improvement I'm considering going out and buying Serious Sam II when I pick up Civ IV next week. Night and day.