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BSPZIP is a command-line tool that allows arbitrary files to be embedded within a BSP (GUIs are available). When the map is being loaded the files will be mounted as if they were present in the game's real content folders.

Tip.png Tip: Embedded content can be examined with archive tools that support .zip by opening the BSP file.

While it is usually a good idea to BSPZIP content, there are times when it can cause problems and other times when it won't work at all (e.g. for Maplist Thumbnails). When this happens a resource list can be used instead.


Note.png Note: Remember to set the appropriate VPROJECT before starting to use the tool.

BSPZIP is found at "%sourcesdk%\bin\[orangebox|ep1]\bin\bspzip.exe". It performs several functions:

Adding a list of files

The most common function. There are two related commands:

-addlist <input bsp> <file list> <output bsp>
-addorupdatelist <input bsp> <file list> <output bsp>

The former command packs all files in the list, the latter (untested) packs only those that have changed since the last operation. In both cases it is possible for the input and output files to be the same.

Note.png Note: The -addorupdatelist option may only exist for the orangebox (rather than ep1) SDK features

The 'file list' is a .txt file containing this pattern:

  • Internal paths ('relative paths') are the location the file will take within the BSP, e.g. materials\metal\new_steel.vmt.
  • External paths ('full paths') are the location of the file to be packed, e.g. C:\Users\Public\our_maps\materials\metal\new_steel.vmt.

Adding a single file

The same principle as above, but without a file list.

-addfile <input bsp> <internal path> <external path> <output bsp>

Viewing and extracting files

If you have an archive tool installed that is able to look inside BSPs it's better to use that. If you don't, these are the commands you need:

-extract <bsp file> <>
-extractfiles <bsp file>
-dir <bsp file>

Handling cubemaps

Should be self-evident:

-extractcubemaps <bsp file> <output folder>
-deletecubemaps <bsp file>


There are situations where files won't be loaded from BSP files correctly. As time goes on they become fewer in number, but it's always worth checking regardless. The easiest way to do so is moving all of the embedded content out of the game's folders -- or even better, not storing it there in the first place.

See also