down. If the joystick is pulled diagonally when running, the soldiers will perform an evasive roll that prevents them from being killed, in addition of dodging enemy fire as well. Once all lives are lost, the game is over unless players insert more credits into the arcade machine to continue playing. If a memory card is present, the player is allowed to save their progress and resume into the last stage the game saved at. Like many earlier games released by SNK, it is well known for its high difficulty, with the final boss being particularly infamous among players for disabling continues after reaching the end of the last stage and if the players are killed during this battle, it will automatically trigger the bad ending, forcing to restart the game from the beginning in order to achieve the good ending. Both players begin the game with a standard machine gun with infinite ammo and ten grenades. When certain enemies are killed or certain building structures are brought down, they will drop guns, grenades or other items that can be collected, such as points or 1UPs. The guns that can be picked up during gameplay consists of the Balcan (A more powerful machine gun), a flamethrower capable of only taking out ground units and a missile launcher, while the other grenade-type weapons that can be collected are the spark and napalm bombs. If the players save a female hostage from the enemy, the hostage (named Chris) will help players by shooting at enemies, until the player who rescued her is killed or reaches the end of the area. On occasions, the players are sent into a boss round that takes place in between stages. Plot "The roar of the helicopters overhead snaps us back into reality. We will never forget the nightmare of that summer..." these were the phrases that started the story of Silver and Brown, two soldiers who were recalled back to the Natorm headquarters in the summer of 1975, during the final months of the Vietnam War, in order to rescue the ex-U.S. army scientist Dr. R. Muckly, who was kidnapped and presumably imprisoned in the interior of Vietnam by North Side terrorists, as part of an organized special forces unit. The team proceeds with the mission by going up to Yan river on a boat in order to deceive enemy guard, but their operations are quickly