The creator of Garry's Mod has revealed that he intentionally added an error message to the commercial version of the mod, which only appears in pirated versions of ...
Instead, he wants this to serves as a point of humiliation for people running illegitimate copies of the game. "I did this for the people that did buy Garry's Mod. They get to point and laugh at ...
This is pretty great. You know Garry’s Mod, right? It’s basically a sandbox “game” built on the Source engine. It’s only $10, but apparently there are people out there who feel the need to pirate it.