An early playable prototype of the popular Left 4 Dead co-op shooter called Zombie City has just surfaced online.
The leaked model is very primitive, and does not contain zombies. Instead, players are faced with AI terrorists who can only attack the player using melee attacks. The past hours have seen dozens of videos of the game spread, as you can watch below.
The original Left 4 Dead was released in 2008 by Turtle Rock Studios, the team that was known as Valve South at the time.