The gorgeous indie adventure will be released in five episodes, and the first two are available now as part of a pre-order program. For 11 Euros (that's after a 20-percent discount for early buyers), you'll gain access to the first two parts and all that follow in the future. The Dream Machine isn't tethered to any specific device -- it's playable online from any computer (Mac, Linux or PC) and stores your save files and inventory safely in that great Cloud in the Skynet.
If you're curious, you can try the first episode for free right now. And if you wanted the whole thing for free, remind yourself that two guys have spent over two years squishing clay and cardboard into a game.