Hell Island

Four groups of special forces are being parachuted into Hell Island with no idea who or what will they be fighting once they get there. Can the best of the US armed forces defeat their unknown enemy? Definitely one for the boys, it's action-packed.
It is an island that doesn't appear on any maps. A place where secret tests have been going on. Tests that have gone terribly wrong...
When all contact with the island is suddenly lost, four crack special-forces units are dropped in. Their mission: to land on Hell Island and discover what has happened.
Nothing can prepare them for what they find there. You could say they've just entered hell. Only that would be wrong.
This is much, much worse.