CastleStorm, the medieval 2D physics-based destruction game from Zen Studios, will be launching on XLBA tomorrow. Built on the fond childhood memory of building and destroying Lego castles, CastleStorm is said to mix destruction with tower defense and a comical story. Along with a 12 level single player campaign, multiple co-op and multiplayer modes, CastleStorm also features a dynamic castle editor allowing players to construct their own castles which can be used in game. CastleStorm will set you back 800 MSP when it releases May 29.