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In the year 2525 space is again threatened. Only the legendary Super Jet Plane SYD can defeat the invading armada and destroy the Fulvalence Groma.

Alpha Mission II is a top-down, vertically-scrolling shooter and the sequel to Alpha Mission. When the game starts the player picks two armors for their SYD, and additional armors can be purchased at the end of each level. Armors add additional firepower to the ship while equipped, and will be destroyed when shot, saving the ship from one hit. The SYD's primary weapons, a straight ahead laser and falling bombs, can be upgraded from icons dropped by specific enemies. Similarly to Xevious ground targets can only be hit by bombs, while aerial targets can only be hit by lasers.


Alpha Mission II Arcade Select your control.
Alpha Mission II Arcade Bigger ships appear now.
Alpha Mission II Arcade Blasting an alien over a grid.
Alpha Mission II Arcade Approaching the enemy.

Promo Images

Alpha Mission II Screenshot
Alpha Mission II Screenshot
Alpha Mission II Screenshot
Alpha Mission II Screenshot


Alternate Titles

  • "ASO II: Last Guardian" -- Japanese title
  • "ASO II 〜ラストガーディアン〜" -- Japanese spelling

Part of the Following Groups

User Reviews

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Critic Reviews

Consoles Plus Neo Geo Sep, 1991 90 out of 100 90
Computer and Video Games (CVG) Neo Geo Oct, 1991 88 out of 100 88
1UP! Neo Geo Jul 18, 2016 83 out of 100 83
Video Games Neo Geo Feb, 1992 4 out of 5 80
Pure Nintendo Nintendo Switch Jun 19, 2017 7.5 out of 10 75
All Game Guide Arcade 1998 3.5 Stars3.5 Stars3.5 Stars3.5 Stars3.5 Stars 70
Defunct Games Neo Geo Dec 19, 2004 B- 67 Nintendo Switch Apr 16, 2017 6 out of 10 60
Video Chums Nintendo Switch Aug 01, 2017 5.1 out of 10 51
The Video Game Critic Neo Geo Aug 08, 2004 D 25


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Contributed to by Trypticon (11041), mars_rulez (43839), Lain Crowley (6783), Michael Cassidy (21142), Rik Hideto (397653), firefang9212 (74296) and Foxhack (31138)