Geo Storm

Arcade Video Game published 25 years ago by Irem

Geo Storm screenshot

Emulated in MAME !
Information for the following ROM(s): geostorm


Geo Storm © 1994 Irem Corp.

Geo Storm is a scrolling run 'n' gun platform shoot-em-up for one or two players who must battle their way through numerous enemy-packed stages, each ending with a tough boss battle.

Each player-character weilds two machine guns simultaneously and can fire in all directions. At certain points during a stage, players may find armoured vehicles that can be entered and driven, offering increased fire-power and protection from enemy weapons, but if a vehicle takes too many hits, players must quickly exit it before it explodes. Enemy troops also have vehicles at their disposal.

Each stage is littered with sexy female hostages waiting to be rescued and medals can be collected for extra bonus points.
Goodies for Geo Storm
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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.