An army of 50 soldiers was sent to liberate an island, but the commander badly underestimated the 100-plus enemy fighters waiting there. Most of the force was captured, scattered, or killed. Two survivors remain: Major Merc and Sgt Acer. Major Merc devises the Sure Shot Tactic — two soldiers positioned on opposite sides of the field, sandwiching enemies in crossfire — as the only viable way to complete the mission and free the hostages. Twenty-five levels across five zones, with eight enemy types and two hostage types standing between them and the end.