I've been working on Kairo for nearly a year now and while it won't be finished until later in the year I figured it was time to open pre-orders. However the exciting news is that by purchasing a pre-order you will get download access to alpha builds.
The alpha build currently includes the first (and smallest) of the game's three areas in a fully playable form.
Pre-orders are priced at $8 and can be found at the Kairo microsite site:
Kairo.lockeddoorpuzzle.com
If you've not been following development let me tell you about the game. Kairo is a 3D first person atmospheric exploration and puzzle solving game inspired by minimalist and abstract architecture.
Here's a recent gameplay trailer:
I've purchased my pre-order. Thanks for the notice.