Maps

Unpack the .bsp map file into your cstrike/maps directory. If the archive has .wad files, put them in cstrike. Map sounds belong in cstrike/sound. In localized versions the game folder might be cstrike_russian, and files there take precedence.

Map files (.bsp) go into cstrike/maps. Texture archives (.wad) go straight into cstrike. Sound files should be put inside cstrike/sound, often in a subfolder such as weapons. If a map uses custom textures and the .wad is absent, you will see black or purple surfaces.

Bring up the console with the ~ key and enter map mapname without the .bsp extension. Or go to the New Game menu and pick the map from the list. The map needs to be in cstrike/maps.

Verify that the .bsp is in cstrike/maps and any needed .wad is in cstrike. Missing textures show up as purple or black. If the map crashes, it might be damaged or incompatible; download it again or try a different version. Also confirm you are using the right game folder (cstrike or cstrike_russian).

Delete the custom .bsp file from cstrike/maps. You can also remove its .wad files from cstrike and map sounds from cstrike/sound if no other map uses them. Default maps are restored by verifying game files or reinstalling the game.

Custom maps work online if the server has the same map. When you join, the client may download missing map files if the server allows it. If your local map files differ from the server's (consistency check), you may be kicked. For your own server, upload the .bsp to cstrike/maps and restart or change the map.

Put the map's .nav file in cstrike/maps alongside the .bsp. Many custom maps come with a .nav for bots. Without a matching .nav, bots may not navigate properly on the map.