Zombie Colony is a real time shooter survival strategy game. Scavenge for resources, build your camp, and survive against zombies.
The first official alpha build of Zombie Colony. To install, simply extract it into the SourceMods folder of your Steam directory. It requires Half Life 2 Deathmatch AND Episode 2 to be installed.
A full tutorial can be found here. To install, simply extract the folder into your SourceMods directory under Steam like any other mod.