Exerion (c) 1983 Jaleco.
An early shoot'em up featuring parallax effects in the background and a nice simulation of inertia in the control of the ship.

>>> TECHNICAL DETAILS
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Main CPU : (2x) Z80 (@ 3.333333 Mhz)
Sound Chips : (2x) AY8910 (@ 1.666666 Mhz)
Screen orientation : Vertical
Video resolution : 224 x 320 pixels
Screen refresh : 60.00 Hz
Palette colors : 32
Players : 2
Control : 8-way joystick
Buttons : 2

>>> TRIVIA
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Released in November 1983.
Licensed to Taito for US distribution.
A part of this game was later used in the fifth stage of 'The Game Paradise'. The stage is called '23bit CPU captured by 8bit CPU'.
Giorgio Bonetti holds the official record for this game with 3,679,100 points.

>>> TRICKS AND TIPS
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* Hint : To get a high score, if you do not miss any shots your bonus score will keep on doubling to 10,000 then reset to 000. When at 10,000 miss a shot then bonus score will revert to 5,000.
* Bug : In the challenge stage, if you shoot all 40 aliens you normally get a bonus charge of 60. Sometimes a red hydra comes out during this stage. If you shoot it and all 40 aliens, you get a total of 41. The game seems to fail the test of 'hits=40' and only gives you a bonus charge of 41.

>>> GAME PORTS TO OTHER SYSTEMS
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* Consoles :
Sega SG-1000 (1983)
Nintendo Famicom (1985)
* Computers :
MSX

>>> OTHER GAME RESOURCES
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Game's rom.
Machine's picture.