Alpha Mission 2 / ASO II : Last Guardian

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Alpha Mission II Arcade Flyer.jpg
Developer SNK
Meg Count 47
NGH # 007
Release Neo Geo MVS - 3/25/1991
Neo Geo Home - 07/01/1991
Neo Geo CD - 09/09/1994
Producer(s) Eikichi Kawasaki
Designer(s) Kazuto Kouno
Kazuhiro Shibata
Keisen Yamaguchi
Programmer(s) Sho Chan
Composer(s) Kazuhiro Nishida
Toshikazu Tanaka
Yoko Osaka
Genre(s) Shooter

Alpha Mission II is a vertically scrolling full screen shoot 'em up released by SNK in 1991 for the Neo Geo arcade and home systems. As the name suggests, it is the sequel to the 1985 arcade game Alpha Mission. It was later released for the Neo Geo CD in 1994. The player controls a fighter spacecraft (Armored Scrum Object) and can shoot enemies in the air, bomb enemies on the ground, collect power-ups, and defeat bosses to advance levels.


The game controls uses 2 or 3 buttons used depending on the selected shuttle mode. The ship's armaments consist of air-to-air laser shots, air-to-ground missiles and any Power Weapons the player collects. The laser and missiles can be upgraded up to four times by collecting the powerups from drones that are shot. Power Weapons are available after the player collects three pieces of the same armour type or can be bought with credits acquired after each stage.

The weapons have limited power indicated on an energy meter. Using the weapons or getting the ship damaged lowers the energy. The energy can be recharged by collecting E power ups. Once the energy expires, the ship returns to normal mode. Depending on which mode is selected varies whether Button C or B activates the Power Weapons. Various hidden items can do certain things like an R item can put the shuttle in Reverse for a certain distance. The shuttle is destroyed by one shot or by running into an enemy unit or hazard. Unless the player collects enough K power-ups beforehand, the missiles and laser shots will be lost to minimum power when the player loses a life.

There are seven stages in the game, with the last one consisting of a single boss battle. The player has to fight through them avoiding hazards in addition. Mid-bosses very occasionally appear in the game. When the player meets a mid-boss or end stage boss, the player must destroy weak points and various parts of the boss to destroy it.


Ten years after the events of Alpha Mission, the Seven Star Alliance, now lead by the gigantic transforming android Fulvar, has resumed its war against Earth. In response, the high-performance space fighters SYD-RX and SYD-FX have been dispatched from the space carrier Dolphin to curb the Alliance's assault.


Cartridge/CD Shots



Alpha Mission II Guide and Walkthrough by IceQueenZer0



Debug Dip Switch Settings

Debug Dip Switch Settings


ASO II: Last Guardian PCCB-00062 (05/21/1991) from Pony Canyon/Scitron

Game Connections

Alpha Mission / ASO: Armored Scrum Object