Garrys Mod is one of the most interesting modding tools out there. Essentially a sandbox entry, it gives players the power to be as creative as they can using assets from the Half-Life games. It was ...

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 ...