Garry's Mod, the thing that let's you do all the weird things to Source games like Half-Life 2, has earned about $22 million since it was released over seven years ago. Creator Garry Newman of Facepunch revealed the figure when asked by a fan, but he also added that a lot of the profits have gone to taxes.
"Over 7 years GMod has made about 22 million dollars," Garry shared. "We get less than half of that though. Then the tax man gets a bunch of that. Then when we take money out of the company the tax man gets a bunch of that too."
A lot of Garry's Mod success has been through word of mouth, and the regular features update it gets. Plus, it's only $10. Facepunch is currently working on a Linux version of Garry's Mod, and they're considering a move to Valve's SteamPipe system as well.
Additionally, the team is looking to into creating a new PC game. It's a game Garry has wanted to start on "for ages," and they're trying to get a team together in the office to start work.