The Crate Escape
The Crate Escape was a game where crated zombies need to be fed skulls in order to keep them docile (so they don't break out of the crate). Party goers tried to throw the skulls through the holes in the crate.
For each successful throw, they got a ticket to go toward earning a prize.
They needed to make sure they didn't hit the top middle zombie who was right up against the hole (this would anger the zombie and they are more likely to break out).
This game was a big hit and I'd highly recommend it or versions of it for any party. To make your own, see the how-to.