Cobalt, the action game of "running, jumping, rolling, shooting, throwing, dancing, hacking, rolling, flying, sliding, climbing, looting, deflecting, racing, piñata-ing, passing, scoring… and even more rolling!" is now playable as a discounted Alpha version, developers Mojang and Oxeye tell Kotaku.

I'm not really sure what Cobalt is, but as of today the folks behind Minecraft are helping to make the game, so I'll assume it's going to be great and very, very different.