Gigantic Army is a classic side-scrolling arcade shooter in a sci-fi setting. The game takes place in the 21st century, where Earth is at war with the Ramulons, an alien race that has decided to stop humanity's advance into space. Humanity's war against the Ramulons has reached the planet Ramulon itself. Now you have to try on the role of a pilot of a huge combat robot “GMR-34 SALADIN” and destroy the entire army of the alien enemy.