Valve's latest installment, a zombie-fest based on the source engine.
Looks like possibly the greatest multiplayer action that we, as mortals, shall encounter.
It features whats called the "AI Director", which spawns the infected/zombies from different points on the map every time the game is played.
Many claim this game is actually sex in its video game form.
Left 4 Dead Dude 1: wtf that fat shit just threw up on me. thats fucking disgusting.
Left 4 Dead Dude 2: should of been watching your back noob.