If your a fan of the first l4d then you'll absolutely love this one, and even if l4d2 is your first one to play you will be hooked in seconds. Unlike its big brother, l4d2 has a story, with five campain modes starting in Georgia and ending in Louisiana, and the same weapons from l4d are still included along with many more like the ak-47,grenade launcher and the combat shotgun, along with that there's melee weapons, like the Katana,baseball bat,chainsaw, ect. all the special infected you know and love are included along with 3 new zombies, the charger,spitter and Jockey, all made to keep the survivors from camping, along with all new uncommon common infected and , the wondering witch!. The game seems to revolve around onlinee gaming however those who don't have online can still grab a friend and play coop campain. Sadly though this game feels more like an expansion than an actual sequel.