Playable demos for Kairo are now available on the Kairo Website, offering Windows and OS X samples of this first-person puzzle game that's scheduled for release on those platforms on October 21st. The demos are mirrored on AtomicGamer, and here's word:

Enter the lost world of Kairo. Explore vast abandoned monuments. Bring strange and ancient machinery back to life. Slowly uncover the true purpose of Kairo and fulfil a great destiny.

Kairo is an atmospheric 3D exploration and puzzle solving game. Developed by Richard Perrin the creator of the white chamber with music by Wounds (Bartosz Szturgiewicz).

The full game will be released 21st October 2012 for Windows and OSX. Linux and iOS versions due late 2012. You can pre-order today for instant access to a beta build.