It was later ported to the MSX and to the Famicom (by Hect), the latter being included as part of Jaleco Collection Vol.

Taking place in the year 2701, a robot named Ixpel which can transform into an aero fighter is sent on a mission to stop an alien super weapon from reaching the Earth.

The robot may move forwards, backwards and jump but cannot fly, and the fighter may travel anywhere on screen but has limited fuel in which to do so.

To revert from jet to robot, a jump button must be pushed down while the joystick lever is down during flight within the allowed altitude.

The player also has two types of firepower: first is Pulse Laser, a standard beam shot that can be fired consecutively.

Also at the end of desert begins an ocean where the first boss (named STV) awaits and in which the player once again must transform to cross.

After the boss is defeated using Big-Bang, the player then is catapulted into outer space to finish off the main force of alien invaders.

Outer space, unlike Earth, has only one long ground battle phase before the land gives way to bottomless sky of space so the player as did previously must transform to avoid death and where the main alien superweapon awaits for a second boss battle with once again using Big-Bang.