Kairo demo explores puzzling lost world

Shooting faces is all good and well, but sometimes a bit of wandering about is just what you need. We live in fine times for first-person explore 'em ups, with the likes of Proteus, Dear Esther, At a Distance, and Richard Perrin's Kairo. Perrin released a demo for his explore-o-puzzler over the weekend, and announced that it'll be released for PC and Mac on October 21.