Nexon's just released a free version of their military cum zombie shooter, Combat Arms: Zombies. It's free, it uses the Unreal Engine 3, and it has zombies. Need we say more?
Face off with the infected hordes in this standalone tactical arena-FPS based on the Fireteam Mode from the smash online hit, Combat Arms Online! Battle wave after wave of ravenous creatures dead-set on making you dinner. Hold them off long enough, and you might just get evacuated. Upgrade your weapons, and you might just stand a chance. Let them through, and you won’t live to see morning. Make sure your aim is good, watch your back, and pray for a little bit of luck.