The Mighty Bundle is available now on the Indie Royale website, which can be found here. You can either pay the current minimum or pay the suggested price for this collection of games, which is 15 dollars. In order to get the Chiptunes 2012 album, you must pay at least 8 dollars for the collection.
The bundle will include Waveform, Avadon: The Black Fortress, ZafeHouse: Diaries, Derrick the Deathfin, Tidalis and War of the Human Tanks. Each game has a varying amount of platforms it can be played on, so make sure before you purchase to check if the games are compatible with the platform you use.