Garry Newman, creator of the brilliant sandbox Source mod, Garry's Mod, has posted a graph of the game's entire Steam sales history on Twitter. The graph features a red line that represents Garry's predicted sales, and a white line that depicts the actual sales. There is quite a big difference. Garry predicted that interest would tail off towards the end of 2009, but it just kept on going, and going. It's selling more than twice the number of copies each week than it was when it was first released back in 2007. Take a look.
Garry's Mod 9
Back in 2004, Garry's Mod turned Valve's Source Engine into a toybox. Its intuitive UI, straightforward controls and building tools removed the programming barriers needed to be creative with Source. Since then, hundreds of thousands of people have used the mod to attach rockets to the G-Man's head, build a giant robots or mess around with the physics system. The community has created hundreds of new game modes, mods and machinima using the tools.
Today, developer Garry Newman posts on his his site to announce that Garry's Mod has now sold more than a million copies since its launch on Steam in 2007.