Although it first became popular in 2004 as a free download, Garry's Mod has been available on a Steam as an officially-licensed Source engine product since 2006.

Garry's Mod is currently priced at £6, meaning 2,500 pirates is equal to £15,000 in potential lost sales. ' I don't really look at it as lost revenue though, Garry told Bit-Gamer.