CS2D 
Zombie Swarm 2.4 for CS2D
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Zombie Swarm 2.4 is a classic from Counter-Strike 1.6. It's a Half-Lİfe based mod.Simply:
-You're alone in the dark with some weapons and a lot of zombies.
-Zombies are fast and strong.
-The only way to survive this apocalypse is staying together with your team and fighting to the death.
TIPS:
If you're a human, stick together with your team. You're so defenseless without them. If you're away from them, consider it as you're already dead.
You can buy weapons only with typing .bm or .BM (just like on original Zombie Swarm mod)
Test ServerServer Name: Zombie Swarm 2.4
IP: 37.187.178.247:32378
Map prefix for the modification is zs_