Gunforce II (Geo Storm in Japan) is a run and gun video game developed and published by Irem Corporation in 1994 for arcades. It was Irem's last arcade game.

This game was created by the same staff which would later form Nazca and is considered the spiritual predecessor to the Metal Slug series.



Some of the bosses from Gunforce II

Gunforce II plays much like other run and guns, where you control your character and must move through the stage while shooting down enemies. The character uses two guns at the same time, which fire at different angles each. You can pick up special weapons with limited ammo, which will replace one of the guns. Scattered along the stages are many vehicles, eleven in total, which the player can ride and use against the enemy forces. However, most of them don't provide protection for the player. Along the way the player will also find female hostages which can be rescued, though they only serve to add to the player's score at the end of a stage.


  • Some of the music in this game are remixed tracks from Air Duel, another Irem game;
  • Many of the sound effects used in Gunforce II were reused in Metal Slug, such as weapon samples and enemy voices;
  • Gunforce II and Metal Slug feature a very similar graphical design, right down to small details such as explosions and shrapnel;
  • It is possible that Metal Slug was originally intended to be a sequel to Gunforce II, given the similarities between the two games.

Flyers and covers

Main Series Metal Slug: Super Vehicle-001 | Metal Slug 2 (X) | Metal Slug 3 | Metal Slug 4 | Metal Slug 5 | Metal Slug 6 | Metal Slug 7 (XX)
Spin-Offs Metal Slug: 1st Mission | Metal Slug: 2nd Mission | Metal Slug Advance | Metal Slug 3D
Mobile Metal Slug Mobile | Metal Slug Mobile Impact | Metal Slug: Allen's Battle Chronicles (Mobile 3) | Metal Slug Mobile 4 (UMS: Login) | Metal Slug Soldiers (UMS: Tank Conspiracy) | Metal Slug Fighters (UMS: Fierce Battle) | Metal Slug Warriors (UMS: Triumph) | Metal Slug STG | Metal Slug Mars Panic! | Metal Slug Tactics | Metal Slug M1 | Metal Slug M2 | Metal Slug 2013 | Metal Slug Team Mission | Metal Slug Defense | Metal Slug Attack | Metal Slug XX Online
Pachinkos Metal Slug Type-A | Metal Slug SV-001 | Metal Slug 3 (Pachinko)
Compilations Metal Slug 4&5 | Metal Slug Anthology | Metal Slug Complete PC | Arcade Archives
Cameos The King of Fighters '99 | The King of Fighters 2000 | SNK Vs. Capcom: CHAOS | Neo-Geo Battle Coliseum | The King of Fighters: Maximum Impact 2 | SNK Vs. Capcom: Card Fighters Clash | SNK Vs. Capcom: Card Fighters DS | Days of Memories 2 | Neo Geo Heroes: Ultimate Shooting! | Battle Cats
Canceled / Discontinued Metal Slug Zero | Metal Slug Touch | Metal Slug Revolution | Metal Slug Wars
Ikari Warriors Ikari Warriors | Victory Road | Ikari III: The Rescue | Ikari: Leona Gekitohen
Irem's D.A.S. Trilogy

In The Hunt | Undercover Cops | Gunforce II