Exerion is a shoot 'em up game featuring parallax effects and inertia simulation, something notable for 1983. The player travels around strange scenarios shooting aliens. The player has two types of guns: fast single shot (limited) or slow double shot (unlimited). In 1984, along with the MSX1 port of the original, a sequel was released titled Exerion II: Zorni for …

This game is a vertical shooter like Phoenix and Galaga. The background has a dotted starfield. Your ship can move left and right and a short distance up and down. The first wave's enemies are girls riding down the screen on large snakes. The second wave has usual monsters attacking.

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