What do you do when your released games unexpectedly make all the money in the world? Use some of it to create prototypes of other games, I guess. Facepunch Studios, makers of Garry’s Mod and Rust, are beginning to write about different projects they’ve been developing. The first is Riftlight, an arcade shooter with “light-RPG” elements like levelling and skill trees. Over on the Facepunch blog, designer Adam Woolridge has concept art, early in-game footage and other details, some of which I’ve picked out below.