Take command of your mercenary forces in Atom Zombie Smasher. The zombie apocalypse is upon us and it's up to you to evacuate everyone before they fall prey to the undead. Conduct massive rescue operations with a helping hand from snipers, artillery crews, orbital bombardments, and more. Experience the tactical richness of fully-destructible environments and procedurally-generated campaigns. And when the apocalypse ends, create your own game mods and share them with the Online File Share.
I got this game as a part of the third Humble Bundle. I did not expect to like it much. The game was a bit depressing at first because the zombies just tear you apart. There comes a point where your forces get a good bit better. At that point I was addicted. I still lost my first game. It helps to learn how to use your forces. The ability to change the rules on a per-game basis game me a lot of replayability. I could make the game as easy or hard and long or short as I want.