: The content should now appear in your spawn menu or game mode list. Technical Details Format : 7z (LZMA/LZMA2 compression).

: New character skins, props, or environmental assets. Maps (.bsp) : Custom levels for the game.

is a compressed archive file, likely containing a collection of Garry's Mod (GMod) addons, maps, or assets.

: Usually found at: C:\Program Files (x86)\Steam\steamapps\common\GarrysMod\garrysmod\addons