The only thing preventing the zombie apocalypse is 90 million tons of nuclear warheads. And you.
Mercenaries for hire: Hire and upgrade your ragtag group of snipers, demolition teams, orbital bombardment crews, and more.
No two cities are the same: Cities are procedurally-generated, giving a unique experience with each playthrough.
Destructible environments: Yes, you can absolutely blow up everything.
Play with friends: Up to three people can cooperatively play together.
Mod support: Modify the game rules however you like, and share your mods through the Online File Share.
Operating system: Windows XP/2000/Vista/7, Mac OSX 10.6+, or Linux
RAM memory: 512MB
Free hard drive space: 60 mb
Sound: Anything from the past 15 years
Controls: Keyboard and mouse