Zombies have attacked and mankind has been devastated. Every day is a battle in the war to survive. Few remain to hold them off. Shoot those zombies and save the world.
Rise to the call of duty to execute covert operations in the snow. Destroy wave after wave of gunners, rocketeers, jeeps, and UAV's, earning money and buying weapons along the way.
Save the rebel fortress from a never-ending onslaught of enemy troops, jeeps, tanks, artillery and helicopters. Shoot them all down before they destroy it.