How to Find an s&box Gamemode's Package Identifier

When you're configuring an s&box dedicated server, the +game command-line switch wants a package identifier, not the friendly name you see on the sbox.game page. Get this wrong and the server won't load – you'll see "package not found" in Log Viewer and nothing else.

The good news: package identifiers are extremely easy to spot. They live right in the URL.

The pattern

Every game and map on sbox.game has a URL like:

https://sbox.game/<author>/<package>

The package identifier is just <author>.<package> – take the URL slug, replace the slash with a dot.

Some examples:

• https://sbox.game/facepunch/sandbox → facepunch.sandbox
• https://sbox.game/facepunch/walker → facepunch.walker
• https://sbox.game/garry/scenemap → garry.scenemap

The author part is whatever Facepunch developer account or org published the package. The package part is the package's own name. Both are always lowercase, no spaces, no special characters.

Maps work the same way

If a gamemode supports loading specific maps, you pass the map identifier as the second argument to +game:

+game facepunch.sandbox facepunch.flatgrass

That's facepunch.sandbox from sbox.game/facepunch/sandbox, and facepunch.flatgrass from sbox.game/facepunch/flatgrass. Same URL-to-identifier pattern.

If you don't pass a map, the gamemode's default map loads.

Common gotchas

A few things that catch people out:

• Don't include https://sbox.game/. The identifier is just author.package, no protocol, no domain. +game https://sbox.game/facepunch/sandbox won't work.
• Don't use the page title. Some gamemodes have friendly titles like "Walker FPS Demo" or "Sandbox Mode". The server doesn't care about those – it only matches against the URL slug. +game Walker won't resolve; +game facepunch.walker will.
• Case matters – kind of. Identifiers on sbox.game are always lowercase. If you see capitalised text in a tutorial, it's almost certainly wrong. Stick to lowercase.
• The package has to actually be published. If you're trying to host your own in-development gamemode, you can either upload it to sbox.game first or pass +game <path-to-.sbproj> to load it from disk – see the configuration guide for that.

Where to set it

In the LOW.MS Control Panel, open Commandline Manager from your server's sidebar and edit the +game value. Save and restart. Log Viewer will show the package downloading from sbox.game's cloud and the server coming up.

For the broader configuration picture, s&box server configuration covers every flag the server takes. If a +game change isn't applying, s&box server troubleshooting has the usual suspects.