1 0 2The Sky Fortress is a boss in level 23. Use Indiana Brones, get on top of it and use melee on an enemy to throw it off the fortress. For me, the Achievment didnt unlock for hours, then i installed the Beta Version on Steam (righklick the game - properties - beta) and it unlocks instant.Posted by Dooky on 13 Nov 23 at 11:46 This achievement has been fixed! You can get it normallyPosted by Noomi on 05 Feb at 18:44