Double Fine's renamed Xbox Live Arcade title Iron Brigade--originally known as Trenched--is now available worldwide, the developer has announced. The third-person shooter, tower defense title is available for 1200 MS Points ($15).

The game launched in June for the Xbox Live Arcade in North America, but was held from release in Europe due to a trademark challenge from the maker of the "abstract strategy" board game Trench.

Iron Brigade was recently updated to include a new survival mode, along with a few additional features.

Double Fine is also offering a special "I" shirt, which the company refuses to call a T-Shirt for trademark reasons, for $20 to celebrate the game's launch. More information is available on the developer's official site.