Featuring ten tanks from World War II, Mobile Armor is a mission-based shooter in which you control the "Mars army tank" in battle against a succession of "Earth army tanks." Completed missions in single-player story mode become available for two-player free mode, with one player manning the cannons and the other the tank, as well as for two-player VS mode. In VS mode, five tanks are available from cleared story mode missions, with another five added based on the number of cumulative defeated Earth army tanks.<br><br>Tanks are rated in speed, range, power, energy, armor level, and recovery ability, and can be upgraded with generic equipment such as a Hyper Engine, L-Range Unit, Armor A, B, and C, Super Cannon, and Spare Energy. In-game screen displays show radar, opponent's tank, speed gauge, energy gauge, lock-on sights, armor level, and movement. Damage is calculated based on the distance between combatants. Closer shots are more damaging but being too close or behind a wall may actually prevent a shot.