Ratship Rumble is the fourth level in Battletoads & Double Dragon: The Ultimate Team.
This level is played with our heroes riding on space pods in outer space while in pursuit of the Dark Queen's dreaded city-sized space battleship, the Colossus, on its way toward Earth.
Gameplay is reminiscent of Asteroids (Atari, 1979), as well as Solar Jetman (another game developed by Rare); pressing the Control Pad Left and Right will rotate the pod counterclockwise and clockwise, respectively, and the Action button is used to fire bullets. By holding down the Action button, an aiming device will appear; still holding the button down, the player can then direct this device onto their intended target, and once it locks on, the button can then be released and the pod will fire a homing missile. The pod has an unlimited supply of these at its disposal.
As the level begins, the player's space pod is thrown near the center of the screen and a myriad of Astro Boulders of all sizes will start entering and crowding the screen from every possible angle. These break apart when shot, but the resulting debris tend to travel faster and in random directions, and due to their smaller size they are harder to hit. After each batch of asteroids has been cleared, the Ratship will briefly re-enter the screen and deploy a new one.
After all three batches have been dealt with, the Ratship will reappear and start moving up and down, launching cross-shaped Mines at different heights that will burst after a moment of being deployed, sending out shrapnel in a cross pattern. The mines will yield increasing bonus points if destroyed one after another without missing. If enough are destroyed this way, they will eventually yield a 1UP.
Once the first batch of Mines has been disposed of, the ship will reappear and repeat the attack, although this time the mines will move much faster and send shrapnel flying out in a diagonal pattern. For its last round, the Ratship will deploy even faster traveling Mines, now spherical-shaped, which will explode soon after being deployed (these don't send shrapnel flying out, but generate a wide area explosion).
For its last round during this phase of the level, the Ratship will deploy flying saucers of all colors that will start shooting projectiles in random directions. These flying nasties are quite resilient, so try using your pod's missiles as much as possible.
The second half of the level is taken entirely by the boss fight against the Colossus. Gameplay changes a bit during this phase of the level; the player's pod is now fixed pointing at an angle, facing straight at the Colossus, and now the objective is to take the spacecraft down piece by piece while avoiding its vast array of devastating weaponry.