Call of Duty 4: Reign of the Undead

Reign of the Undead Revolution 0.7 by Luk and 3aGl3 turns Modern Warfare's multiplayer into co-op survival. Up to eight players pick one of six classes, from medic and engineer to armored and assassin, and hold out against waves of zombies, fast runners, toxic and burning variants, hellhounds and boss waves.

GRN runs it on CoD4X 21.2 with our own additions on top: a bank that keeps your points between maps ($bank, $deposit, $withdraw), killstreaks up to an AC-130, extra shop items and defences, nineteen more guns, and wave challenges that pay out for headshots, revives and clean waves.

Nearly sixty maps are in the vote, the nine stock maps plus community survival maps from Verrückt to Springfield. Every finished game is recorded, and the leaderboards here show kills, best waves, revives and time played.

To play you need the CoD4X client. The CB Servers Launcher installs and updates it for you, or the official CoD4X installer adds it to a Steam copy; our install guide walks through both. Add the r_xassetnum launch option from the guide, then join with /connect 167.114.157.225:30028 from the console. The mod and maps download on the first join, so the first connect takes a few minutes.