A group of mercentaries, led by DC (Ray Stevenson of ROME, PUNISHER: WARZONE) are by an English guy named Hunt to take him to location in Eastern Europe. They think it will be easy money. It turns out to be an old Nazi bunker from World War II. But almost immediately they are shot at from the woods and one of them is injured. After a particularly long firefight they go to investigate the nearby woods but don't even find shell casings from the spent bullets. So they hole up in the bunker and get the electricity working. While some of the mercs are exploring they come across a room filled with recently dead bodies--and one of them is alive, a very pale, gaunt man who will not utter a word. He seems almost catatonic.
Hunt reveals that he's looking for something the Nazi's were experimenting with, a type of energy that would make their soldiers unstoppable. He finds the machine they used. But when shapes begin to appear and we see that they look like Nazi soldiers, he believes that they are the result of these experiments. In fact, that is who was shooting at them--these zombie-like Nazis.
OUTPOST is a well produced horror movie along the lines of SHOCK WAVES. In fact, it could almost be a sequel to that movie since it deals with very similar themes and, of course, has zombie shock troopers. You can't go wrong with that.