Compatible emulators

Synopsis

The first shoot 'em up in video game history. The player controls a laser cannon that he can move horizontally at the bottom of the screen. In the air, rows of aliens move sideways while gradually getting closer to the ground and launching missiles. The objective is to destroy an enemy wave, which consists of five rows of eleven aliens each, with the laser cannon before it reaches the bottom of the screen. The player earns points every time he destroys an invader. The game only allows one shot at a time and allows you to cancel enemy shots by shooting them. The speed and music increase as the number of aliens decreases. The total elimination of the latter brings a new, more difficult enemy wave, and this indefinitely.

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