Minecraft has already been plenty successful on the Xbox 360 as a downloadable game, but there will soon be another way for players to find their way into the world-building environment. Microsoft announced today that Minecraft: Xbox 360 Edition will be available as a disc-based game at all the usual US retail outlets on April 30th, where it'll set you back $19.99. The game will be otherwise identical to the downloadable version, and come complete with all the features and content that will be included in the forthcoming ninth update to the game. Gamers in Australia, Hong Kong, India, New Zealand, Singapore and Taiwan will have