A post from a few days ago on Garry’s Blog noticed by Big Download mentions the second anniversary of Garry's Mod going on sale via Steam, offering the commercial version of this mod that allows a great deal of freedom in using Valve's Source engine to create machinima movies and to play with game assets in a sandbox environment. The post thanks Valve, the members of Team Garry, and other contributors for helping make this project so successful, and reveals just how successful it has been, as over 300,000 copies have been purchased over those two years, which the math guys at Shacknews point out adds up to more than $3 million in revenue, based on the mod's $9.99 price-tag. Thanks Mike Martinez.