Free Zombie Mod · No download · No install · Instant play
zm_3rooms_csa is a CS 1.6 map made for Zombie Mod. As a zm_* map, it joins 1072 other zombie-survival maps in that family that we host with a real overview. You'll find the full zm_3rooms_csa overview here — play it free in the browser, nothing to download or install.
Were you looking for zm_3rooms? zm_3rooms_csa is a server variant of it — the zm_3rooms page has the full overview and map details.
zm_3rooms_csa is a Zombie Mod map. Humans buy weapons and weld or block chokepoints to hold off the horde; zombies use speed and knockback-resistant health to break the line. Survive to the end of the round as a human, or infect everyone as a zombie. On Combat Skirmish it runs directly in your browser through WebAssembly — click Play and you are dropped straight onto a live public server, no Steam account or download required.
Public Counter-Strike 1.6 servers cycle zm_3rooms_csa in and out of rotation. Open the in-browser server browser to see which servers are running zm_3rooms_csa right now and jump in — no Steam, no download. Open the server browser →
Read next: whether anyone still plays, zombie mod and playing on a school or work network.