Games-db / Arcade /




| 1983

Release type:
Developer: Jaleco
Controls/Input Device: Control(joy8way), Buttons(2)
Number of Players: 2
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SoundMix: Mono
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Exerion VGMuseum Game Endings
Exerion on CAESAR
Exerion high score and replay at MARP
Exerion on datObase
Mameinfo.dat entry:
0.37b10 [Yochizo]


- 0.147u2: hap fixed clone Omega Fighter Special. The game fails to boot or finish post. After showing bad rom errors, the game resets.

- 0.147u1: Fixed maincpu rom loading.

- 0.122u7: Fixed gfx1/2/3/4/5 rom loading.

- 0.89u3: Changed Z80 CPU2 clock speed to 5MHz.

- 0.37b10: Yochizo added 'Omega Fighter' (UPL 1989) and clone Omega Fighter Special.

- 21st November 2000: Yochizo fixed some graphics bugs in the Omega Fighter / Atomic Robo-kid driver.

- 8th November 2000: Yochizo sent in a driver for Omega Fighter and Atomic Robo-kid.

- 25th April 1999: Dumped Omega Fighter Special.

LEVELS: 8 (restarts once)

Other Emulators:

* FB Alpha


* Raine

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Romset: 2016 kb / 8 files / 457.8 zip

Credits Mameinfo and Mametesters Project Robert J. Rabgno et al.
History.dat entry:
Exerion (c) 1983 Jaleco Company, Ltd [Japan Leisure].

Exerion is a vertical shooter that is operated with an 8 direction joystick and two fire buttons. The game's biggest features are the parallax scrolling which occurs in the background, and the sensation of inertia that is applied to the motion of the ship. The ship is equipped with two kinds of weapons. You can fire the dual shot gun which can only release one pair of shots on the screen at a time, but has an unlimited supply, by tapping the first fire button. The single shot gun can fire a rapid stream of shots on the screen at one time by holding the second fire button down, but it is limited in ammo according to the number of charges indicated on the bottom. Each weapon is best used in different situations, in order to defeat the enemies which come flying down from the top part of the screen.

Due to the inertia of the ship, you must input any reverse in direction much sooner in order to cancel the ships momentum. This was not a common feature for similar games that came out around the same time, so it distinguished Exerion from other shooters. Because the Famicom conversion was played on a horizontal screen, the enemies appeared much closer to the player's ship, which changes the feel of the game since you have to react to the enemies' location much sooner.


Main CPU : (2x) Zilog Z80 (@ 3.333333 Mhz)
Sound Chips : (2x) General Instrument AY8910 (@ 1.666666 Mhz)

Players : 2
Control : 8-way joystick
Buttons : 2


Exerion was 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.


* 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.

* Hint : When fire from the double shot (slower) weapon hits an enemy, it re-charges the faster single shot weapon. To keep the single shot re-charged it is possible to fire both weapons at once by tapping both fire buttons, maintaining charge, giving a higher rate of fire and more chance of hitting enemies.

* 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.


* Consoles :
Sega SG-1000 [JP] (1983) "Exerion [Model G-1028]"
Nintendo Famicom [JP] (February 11, 1985) [Model JF-01]
Sony PlayStation [JP] (October 23, 2003; "Jaleco Collection Vol.1 [Model SLPS-03562]") Famicom version
Nintendo Wii [Virtual Console] (May 1, 1987) Famicom version

* Computers :
MSX [JP] (1984)


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Licensed from Alexis Bousiges under a CC Attribution 3.0 License
cheat.dat entry:
00000000 6001 00000009 FFFFFFFF Infinite Credits
00000000 6048 00000006 FFFFFFFF Infinite Lives
00000000 6046 00000050 FFFFFFFF Infinite Firepower
20800000 32D6 000000C9 FFFFFFFF Invincibility
00000000 6098 00000000 00000010 Rapid Fire - Twin Shot
20800000 19D0 000000FA FFFFFFFF Bonus challenge bugfix

Credit Pugsy's MAME Cheat file

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