Valve has released a preview of their box art for their upcoming Survival Horror game, Left 4 Dead.
Click picture for full-size.

GAME INFO:
Left 4 Dead is played in first person perspective, with full visualization of the player character’s body. Up to four players take control of the four main characters of the game, “The Survivors”, who play through the levels fighting off the Infected, which are humans who have been infected with a mutated form of rabies. Survivors can also be AI-controlled bots. Left 4 Dead is focused on cooperation and teamplay for players of the Survivors. Colored outlines that are visible through walls help players stick together and coordinate their movement. Survivors can be knocked down by Infected and can only get up again with the help of a friend. Certain special attacks also require assistance to get out of. Survivors can share health packs and help each other heal. However, Left 4 Dead has full friendly fire that can’t be switched off, but the damage caused is less for already injured Survivors.