Valve announced today that it will run a 24-hour free trial for its popular multiplayer shooter Left 4 Dead this Friday.

The trial will begin on Friday at 12:01 AM GMT (7:01 PM EST Thursday), and will include the recent Survival pack content, which introduces a new multiplayer game mode and two additional Versus campaigns.

Those who wish to give L4D and the Survival Pack a try may now pre-load everything needed to play with no obligation to purchase. A free Steam Account is needed.

Personally I hope to see some known ESR faces in L4D to fight against the zombie hordes, join the already existent ESReality Steam Group (41 members!) so we can play together.

UPDATE Valve extended the free friday 24-hour trial of Left 4 Dead (PC) through the night until Saturday at 5 pm GMT!