There is some setup to do - https://github.com/Steam-Headless/docker-steam-headless/blob/master/docs/docker-compose.md
Make sure to add your GAMES_DIR to Steam as a Library in the settings.
| Environment Variable | Description |
|---|---|
| USER_PASSWORD | Default User Password |
| CONFIG_DIR | Directory to store configuration files |
| GAMES_DIR | Directory to store games |
I have tested games that use Jackbox.tv and while they launch fine, the games require the ability to connect to Jackbox.tv and it seems the container gets blocked by Cloudflare. I have tried a few things to attempt to run traffic through a VPN to no success. For now the workaround seems to be having a computer on the local network to stream the game from inside the container rather than having it installed locally.