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Zombie Survival V2

Zombie Survival is a massive gamemode where humans are pit against a zombie horde. Once a human dies, they become a zombie. The game ends when all the humans are (un)dead or the humans survive a certain amount of time or complete objectives.

It was originally conceived in 2006.
Development discontinued as of 2022.

NO THIS MOD IS NOT SINGLEPLAYER AND NO THERE ARE NOT NPC ZOMBIES OR BOTS.

Zombies are all controlled by actual players. Once you die as a human, you will turn in to the undead, usually right on the spot enabling you to take revenge on your former team members who failed to save you. There are no NPCs in this mod.
In-depth barricading system. Use hammer and nails to fasten down props or deployables such as turrets and ammo crates. Ghosting system allows humans to slowly phase through fastened props.
Deal damage to the undead to acquire points. Use the points to purchase ammo, new weapons, and other tools from the arsenal crate. Arsenal crates are deployed by other players. Destroying them as a zombie effectively stops humans from buying any more.
Multiple unique classes for zombies which are unlocked as the round proceeds, making it harder for the humans as time goes on.
Fear-o-meter system makes it so zombies packed together take less damage, enabling hive-mind induced charges.
The zombie player with the highest damage dealt becomes a boss zombie between each wave. Annihilate the humans from afar as The Tickle Monster, make their life miserable as Puke Pus, or use one of the other boss zombie classes.
Original music score which intensifies with the intensity of the game around you.
Hundreds of ZS maps have been made over the years and is also compatible with nearly every zm_, zp_, ze_, etc. map.
Zombie Escape support. Zombie Escape maps play in their own style from ZS, closely mimicing the gameplay of the Counter-Strike: Source mod.
Other mutators such as Classic Mode and Pants Mode. Play ZS as it was when it first came out or try your chances at surviving vs. an army of pants trying to kick you to death.
Workshop version works for server hosts.