One of worst kept secrets of World War II has finally been declassified. In a bid to stave off defeat, an increasingly desperate Adolf Hitler authorised his scientists to unleash a hoard of dinosaurs upon allied troops. Though rumours were rife during and after the war, this is the first formal acknowledgement of what our boys had to face behind enemy lines.

As reported by Kotaku, the desperate interspecies conflict has been chronicled by Digital Ranch Interactive in its Half-Life 2 mod Dino D-Day. Available now, the mod is doubling as a prototype for a planned commercial release in 2010.

If the idea of facing down reptilian fascists doesn’t scare you away, you’ll be stepping into the shoes of Sgt. Jack Hardgrave, a crack shot and expert palaeontologist. This is a man who, if the trailer is any guide, doesn’t mind a spot of bare knuckled boxing… with a T-Rex.

More news on this one as it develops.

“Excuse me? Do you mind taking a survey?”