Assault Android Cactus is now available on Steam, where they offer a 20% launch discount on this twin-stick shooter for Windows, OS X, and Linux. This announcement has details on the release, word that the soundtrack is also available, and a link to this launch trailer. There's a good summation in this post: "Assault Android Cactus is an intense arcade style twin stick shooter - pick from one of nine unique synthetic heroines and blast your way through overwhelming robots hordes to save the ship from its own workforce. Supports single player and local co-op game modes."