How to install zm_underground_cso in CS 1.6?

Download the zm_underground_cso map file (.bsp), place it in your Counter-Strike 1.6 "cstrike/maps" folder (usually at C:\Program Files\Steam\steamapps\common\Half-Life\cstrike\maps), and restart the game. The map will appear in the map selection menu or you can join a server running it.

How many servers are playing zm_underground_cso right now?

Currently 0 servers are playing zm_underground_cso. The map has been played a total of 597 times across 1 servers.

Zombie zm_

zm_underground_cso

Servers playing now

Total servers

Times played

597

Last played

Dec 30, 2025

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Servers playing zm_underground_cso0

No server is playing zm_underground_cso right now. Browse the server list

How to install zm_underground_cso

Download the zm_underground_cso.bsp map file from GameBanana or another trusted source.
Locate your Counter-Strike 1.6 installation folder. The default path is: C:\Program Files\Steam\steamapps\common\Half-Life\cstrike\maps\
Copy the .bsp file into the maps folder. If the download includes .wad or .res files, place them in the cstrike folder.
Restart Counter-Strike 1.6. The map will appear in the map list, or you can connect to any server running it from the server list.

About zm_underground_cso

zm_underground_cso is a Zombie map for Counter-Strike 1.6. It has been played 597 times across 1 servers. Last played on December 30, 2025.

Zombie Mod (zm_) maps are designed for the popular Zombie Plague modification. One team plays as zombies trying to infect humans, while humans must survive using weapons and barricades. These maps feature strategic defensive positions and escape routes.

zm_underground_cso

Servers playing zm_underground_cso0

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