Launch Arguments#

Steam allows you to specify launch arguments for your games. These can append command line arguments, prepend environment variable definitions, or invoke wrappers around your game

To add or modify launch arguments, right-click your game in your Steam Library and enter them under Steam Launch Options.

If you’re using any env vars (environment variables) and/or wrapper scripts, have one, and only one %command%. Steam will substitute this with the actual launch command for the game.

Make sure the arguments match one of the following orders. Breaking this order can and will prevent your game from starting:

• --some-cli-argument --some-cli-path=/home/myusername/game.cfg if you only need to append arguments or options.
• SOME_ENV_VARS=1 some-wrappers %command% --some-cli-argument if you also need to prepend environment variables or invoke wrappers.