Choose between Leona or Roberto, Squad members of the regular army, and fight your way through hordes of enemies to accomplish each mission. In some missions you can make your life easier by jumping on board themetal slug tank for increased armor, stronger firepower, and the ability to crush everything in your path. Pick up items dropped by enemies and prisoners to get new weapons and score bonuses. Be careful! Some enemies drop mines or bombs achieve a high rank in each mission to unlock special abilities! Beat the game on all difficulties, obtain great high scores, and be the first on leaderboard!