The official demo for Just Cause has been released on the Xbox Live Marketplace. The Marketplace has had a lot of activity in the last few days, with Texas Hold 'Em released two days ago and a new Test Drive Unlimited demo becoming available yesterday. Now Eidos is keeping our Xbox 360s powered on with the new Just Cause demo, which weighs in at a decent 632Mb.
In the game you have to take out a quartet of corrupt army generals, and then transport a vehicle to a location. The actual island you play on isn't in the final game, which means that the island has been created just for the demo, which seems a little bizarre.
A PC demo is also available and can be downloaded here. Just Cause will be available next month in PAL territories, and will be released on Xbox, Xbox 360, PlayStation 2 and PC.