As Corporal Shepard, you are part of a platoon of marines supplying additional security at Monte del Oscuro (an astronomical research facility). Things never work smoothly as usual. Find a way to escape and lead your men to safety. There is a flashback to a Balkan Town to rescue a UN Representative from some warlords.
Finally, Ice, a massive set of levels set in Antarctica. Something has been found in the ice and a number of foreign powers desire it. After the little accident at Monte del Oscuro, you have been given a hardship posting. Defend the base against hostile forces and rescue the scientists!