You wait ages for a surprise launch of additional Quake adventures, and then two come along at once. But now Raven Software's Quake 4 has got in on the action, as a build of the sequel's cancelled expansion has been discovered and uploaded to GitHub. The expansion was thought lost to time, until a veteran game developer chanced upon a copy on the hard drive of a second-hand PC he bought. Speaking to PC Gamer last year, Russell told us that "the expansion pack was 95% done" before Activision pulled the plug. Marshall says he uploaded the expansion for preservation purposes, and in the hope that "the community can make something cool with it."