Rock, Paper, Shotgun points the way to a post on the Crysis-HQ.com Forum (thanks Ant) where they've discovered loads of content in the recently released Crysis demo (story) that's not included in the demo map. They've cooked up a Demo Map #4 download that adds additional vehicles and weapons to the original demo map, and a new Demo Funmap #5 that adds a new small island to the demo map along with these hidden toys. Of course this is all unsupported, and those who choose to do this may be spoiling aspects of the full game for themselves.