: The submarine moves across a side-scrolling environment while a mouse or controller allows you to aim and fire in 360 degrees. Modes :

: 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".

: Reviewers often describe the submarine as looking like a "Fisher Price toy," and the overall level design is noted as being nonexistent or extremely basic.

: Generally considered the more stable versions, though the core gameplay issues remain. Final Verdict

: 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.

: Face endless waves of enemies to see how long you can last.