Why it matters: It's almost hard to believe that Garry's Mod has been around for 20 years. What started as a simple mod built on Valve's Source Engine in 2004 grew into a standalone sandbox "game" by ...

We all know Garry's Mod, the landmark physics sandbox mod for Valve's Source Engine that can be used for everything from creating custom game modes to messing around with Half-Life 2 characters. Since ...

There's a fun holiday surprise over on the Garry's Mod website called the 12 Days of Garry's Mod. The page displays some amazing Garry's Mod creations, like "Half-Life: Full Life Consequences"—a ...