How to Install CS:S Assets

The easiest, most straightforward way to install CS:S assets is purchasing the game through Steam and installing it through there.

This method is heavily recommended for a couple of reasons:

  • Momentum Mod automatically mounts this install location, so once it’s done downloading, you’re all set!
  • Paying at least $5 anywhere on Steam (if you have not already) will be required to submit runs to Momentum
  • You won’t be in a moral/legal gray area

This guide covers how to install CS:S assets using SteamCMD and the Counter-Strike Source Dedicated Server content repository.


  • An internet connection.
  • Some free space on your PC. (~4GB)

Getting SteamCMD


For Linux/Mac refer to Valve’s guide:


  • Make a folder for SteamCMD.
  • Inside of it download SteamCMD, and unzip it.
  • Start steamcmd.exe and wait until you got Steam> waiting for your input.

Getting the files

Inside SteamCMD, type or paste each of the following line in the order:

  • login anonymous
  • force_install_dir ./css
  • app_update 232330 validate

Making the files work in Momentum Mod

  • Inside your SteamCMD folder go into the folder css/cstrike and copy/cut all .vpk files starting with the name cstrike_pak_.
  • From your Momentum folder go to momentum\custom, create a folder cstrikesource and paste all those previously copied .vpk files inside of it. So for example, the path for the _dir.vpk file should look like momentum\custom\cstrikesource\cstrike_pak_dir.vpk.
  • Finally from the Momentum folder open momentum\gameinfo.txt:
    • Find:
                game				|all_source_engine_paths|hl2/hl2_misc.vpk
    • And add the following in a new line right after:
               game				momentum/custom/cstrikesource/cstrike_pak_dir.vpk
    • Save

Note that any updates we may do to gameinfo.txt could cause this entry to be deleted, so if CS:S assets stop showing up, make sure to make this edit again!