Cosmo Tank has three modes. In quest mode, the object of the game is to destroy Alien Life Cores on five planets to free them from Master Insect. Players can earn experience levels in the quest mode by defeating enemies. The maximum amount of experience points that a player can earn is 999; which allows players to reach the level cap of 6. In training mode, the player practices in a closed area and is given a ranking. In vs. mode, the Game Link Cable is used to allow two players to race to defeat the alien leader.
