This Christmas Tripwire Interactive has a whole new twist on killing the undead playable right now: Zeds in Space! Horzine's Moonbase is the setting for the new map, on the dark side of the moon. One small step for Zed? Actually, giant leaps for Zedkind, up there in low gravity. You'll believe Zeds can fly - and they certainly will when you smack them with the new Dwarfs!?