L4D - What does L4D stand for? The Free Dictionary
References in periodicals archive
I loved the L4D
original and Valve have done it again with this monsterpiece.
Due for release on the Xbox 360 and PC this November, the co-operative gameplay of L4D
casts four "Survivors" in an epic struggle against hordes of swarming zombies and terrifying "Boss Infected" mutants.