Destroy the enemy's boss tank to advance to the next level. The more enemies you destroy, the more money and points you earn for upgrades and improvement of your rank.
Defend the planet from waves of invaders. Kill all your enemies, pick up bonuses, upgrade your tank, unlock new types of guns to deal with the 8 end-level bosses throughout the game.
Taken from Hero's popular series into new genres and beyond with 7 enemy types, over 11 unique tower paths and tower merging allowing for mega towers and mega-mega towers.