Metal Slug X is an upgraded version of Metal Slug 2. is a platform action video game developed by SNK and published by Agetec Inc. As Marco, Eri, Tarma, or Fio, you must defeat the evil General Morden and his henchman. To do this, you must defeat various enemies that get in your way. Throughout the game, you can collect new weapons including the Heavy Machine Gun, Shot Gun, Rocket Launcher, Flame Shot, Laser Shot, Flame Bottles, and Armor Piercer. Also scattered throughout the game, you can ride in four different vehicles aka Slugs. Other items such as energy, extra ammunition, and food are also found throughout the game.