Orcs Must Die

In Orcs Must Die you fend off waves of attackers from reaching your portal. You use traps, a spear, a crossbow, and a variety of special powers you'll never touch to stop them from advancing. The game is pretty good. I like it, but I was let down by the lack of online beyond leaderboards. This is a game dying for co-op, and it was boring without it. Maybe because it was too easy or something, but it is still a good game. Once you figure out overpowered the arrow walls are though, the game is pretty much over.