Hard to believe, but Garry’s Mod has been around for 20 years, and even back in 2006, its $10 price tag made it an easy decision for people who wanted to clown around in the physics sandbox or use it to make their own games to play and share.

Garry Newman’s new game creation platform, s&box, is on the brink of an April release, so when I met with Newman this week to chat about the history of Garry’s Mod and the future of s&box, I was curious. How much is the new game-making engine going to cost?