: One of the most common complaints is that the game becomes trivial once you purchase a few upgrades. Powerful weapons like homing missiles, lasers, and energy spheres quickly make the player nearly invincible, removing any sense of challenge.
: Points earned from destroying enemies can be spent in a shop to upgrade your ship's armor and firepower. Critical Reception Ocean Commander
: Set in the year 3011, the Earth's surface is submerged after seismic upheavals. You command a high-tech submarine to defend an underwater city against the "Chaos Empire" and "Dr. Shark". : One of the most common complaints is
: Generally considered the more stable versions, though the core gameplay issues remain. Final Verdict each ending with a boss fight.
: Progress through 20 levels, each ending with a boss fight.