Sky Shark provides some cheesy and gory fun, but sadly only for the first 30 minutes or so, after that, especially the mid section, strongly loses momentum (explanation over explanation etc.) and I was finally rather bored. With a better script, focused on the action like in the beginning, Sky Sharks could have been a fine cheesy horror experience. Anyway, if Nazi-horror movies like Iron Sky, Frankenstein's Army, Ghosts of War, Blood Vessel, Overlord, Dead Snow and the like, or games like the Castle Wolfenstein franchise, rings a bell, you may give Sky Sharks a try.