Geo Storm

The Arcade PCB by Irem Corp.

Geo Storm screenshot

Emulated in MAME !



Geo Storm © 1994 Irem Corp.

A platform shooter that features incredible graphics and rock solid gameplay.


Irem M-92G system hardware

Main CPU: V33 (@ 9 Mhz), V30 (@ 7.15909 Mhz)
Sound Chips: Yamaha YM2151 (@ 3.579545 Mhz), GA20 (@ 3.579545 Mhz)

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


Geo Storm was released in September 1994 in Japan.

The game was originaly an order from the USA, Gun Force had a nice success in the US, so a sequel would be a great idea. It's why it is known in US as "Gun Force II".

The development was chaotic since Irem closes its doors (March 1994) before the release of the game.

During development, this game was code named 'A2'. The name Geo Storm came from the name of the game designer's sport car of these days; the Isuzu's Geo Storm.

Some musics in this game are directly recycled (and remixed) from "Air Duel", another Irem game from 1990.
The Stage 1 music is a remixed version of the Stage 4 music of "Air Duel".
The Stage 2 part 1 music is a remixed version of the Stage 1 music of "Air Duel".
The Stage 2 part 2 music is a remixed version of the Stage 3 music of "Air Duel".

The voices of the female prisoneers were done by the sound designer itself, Hiya!, then re-worked on the computer.


Game designer: Meeher
Graphist: T. Okui
Sound designer: Hiyamuta (Hiya!)

Game's ROM.

Page last modified on November 17, 2016