Left 4 Dead - E3 2008 Trailer
Unlike the Gamescom 08 Trailer, this one features the Original Survivors, This is the last time they were ever seen, until Splinks released them in a destroyed state.
Original Description:
Setting out to do for co-op gaming what Counter-Strike did for team combat, Left 4 Dead is an ambitious survival horror game. Running on the Source engine, Left 4 Dead leaves four armed survivors of a world overrun with zombies, and they must fight their way out to escape the outbreak.