Honoring its unexpected promise , Mojang has made Cobalt—it's first third-party published game—available for sale today. Head to www.playcobalt.com to take a look. Like Minecraft, the side-scrolling, 2D, multiplayer platformer has been released as an alpha that'll be updated over time. If you have a Minecraft account, you can use it to buy and access Cobalt.
"The full game will sell for $26 and it will be discounted 50% to $13 during Alpha. The Beta will have a 25% discount tag," states Mojang's release. Here's a breakdown of the different content that'll be included in the alpha, beta, and final versions of the game, along with an FAQ.(opens in new tab) (opens in new tab) (opens in new tab) (opens in new tab) (opens in new tab)