Players can download "Garry's Mod" from the Steam store, and links to the download interface of Steam appear on GarrysMod.com. "Garry's Mod" is not a full-fledged game by itself, but users can explore the options and creation tools and play games designed by other players.
"Garry's Mod" began as a modification, or mod, of the popular first-person shooter "Half-Life 2." Later versions use a similar engine to the one "Half-Life 2" uses. Instead of giving players specific tasks and tracking points, the default user interface gives players an array of options for transforming the world, creating items and interacting with the environment. This type of game is often called a sandbox since players are free to do what they wish.
However, players have created a wide range of games within "Garry's Mod," and the program hosts links to servers where players can interact with other players. These mods cover a broad range of game types, allowing players to switch between multiple genres within "Garry's Mod" itself. Adventurous players can even create their own games within "Garry's Mod," and the program contains an entire programming framework to allow users to expand beyond what "Garry's Mod" was originally capable of doing. The popularity of "Garry's Mod" helps new game designers tap into a potential audience.