http://www.deadfrontier.com/
If you can't be bothered buying left 4 dead! Obviously not as good. It's a top-down browser/flash based game so you don't have to download anything. There's a load of weapons from pen knives to barrett 50 cal. sniper rifles, and a leveling system (goes to level 200 which nobody is anywhere near reaching).
You start at an outpost in a very large city. It's the only fixed outpost there is, and the further out into the city you go, the longer it's going to take to get back, and the harder and faster the zombies become, but also the better the loot becomes. You search buildings and corpses and cars etc for loot and money. If you die you lose all the money you've gathered on that outing. The only way to keep it safe is to go back to the outpost and deposit it or buy safe deposit boxes.
You can buy loads of weapons and ammunition from the market once you have the skill points required. You spend points in different skills per level up so you have to choose the kind of weaponry you want to specialise in, with room for a few different types.
Oh and you can play with your friends in multiplayer, creating your own game lobbys. Up to 6 people per lobby I think :)
Ignore the terrible music in this video :3
[ame]http://www.youtube.com/watch?v=fyM76jwgdiY&feature=related[/ame]
