Tool-assisted game movies
When human skills are just not enough

Game Information

Genesis Alien Soldier

[Tier: Moons][Fastest Completion]Genesis Alien Soldier (JPN) in 18:32.27 by Dammit & Truncated.
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- Takes damage to save time
- Uses hardest difficulty
- Genre: Platform
- Genre: Shooter

Alien Soldier, released in 1995, is a spiritual successor to Gunstar Heroes (you can tell by the cameo appearances of certain bosses), and a real treat in terms of production values as described in the tagline quoted above. The game's rather nonsensical plot boils down to the protagonist, Epsilon-Eagle, having to fight his former terrorist comrades (as well as everything on his path). Thankfully, speedrunners don't care about plots either way.

What is more important is that Alien Soldier epitomizes Treasure's concept of an action game: a fast-paced, flashy, relentless boss rush. As such, it has 33 grotesque bosses, each of them promising a guaranteed game over for inexperienced players. However, using Epsilon-Eagle's vast arsenal of weapons and dodging abilities, the authors plow through the game's "SUPERHARD" difficulty without any regard to its name in this long-awaited movie, achieving a total in-game time of 8 minutes 13 seconds.

#21093550024865252 - Alien Soldier WCH
Alien Soldier (Japan).wch (902B Memory watch file)
Uploaded 2015-02-27 22:27:50 by Truncated (21 files)
For Genesis Alien Soldier (2 files)
6829 views, 850 downloads
RAM watches. Player and boss exact HP, weapon ammo and reload status, player X and Y position, stage scroll position
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#21093501888640683 - Alien Soldier HUD
Alien Soldier OSD.lua (2.79kB Lua script)
Uploaded 2015-02-27 22:24:42 by Truncated (21 files)
For Genesis Alien Soldier (2 files)
6744 views, 686 downloads
Player and boss exact health, weapon ammo and reload status
Info Download

Weapons, damage and ammo

There are six weapons available:
  • Buster: Straight rapid fire, long range. Weak.
  • Ranger: Spread weapon which makes it easy to hit. Weak.
  • Flame: Short range and high power against organic targets. No effect against machines.
  • Homing: Homing, like it says. Cannot be blocked by bosses. Very weak.
  • Sword: Straight rapid fire, short range. Weak. Blocked by some organic enemies.
  • Lancer: Long range, powerful, all-purpose laser. Blocked by some organic enemies.

There are three other ways to damage enemies:

  • Counter force, which also turns enemy bullets into health (for phoenix)
  • Zero force, what you fire when you run out of ammo. Very weak, very short range.
  • Phoenix, turn into a bird of fire when having full health and performing a zero teleport. Consumes 50 HP. Also turns enemy bullets into health. Causes slowmotion whenever it hits anything.


Each boss has one or many vulnerable parts, which take different amounts of damage. Damage here is measured in RAM (which is 4 times more than that shown on screen).

Weapon DMG/shot at 100% Avg. DMG/frame at 100% Ammo/shot, Fixed Ammo/shot, Free
Buster force 120 40 1 3
Ranger force 240 ~58 [1] 2x 16 2x26
Flame force 120 120 3 5
Homing force 40 20 1 5
Sword force 120 ~48 2 4
Lancer force 4160 ~73 140 150
Lancer switch trick 4160 ~99 [1] 140 150
Zero force 40 20 0 0
Counter force 640/part ~53/part 0 0
Phoenix 18200/part 280/part 0 0
[1]Under ideal conditions.

Abusing the phoenix

A phoenix that hits an obstacle terminates immediately. But if directed at the edge of the screen, it continues to burn in place. Every part takes damage from the phoenix (and counter force) cumulatively. This means you can do incredible amounts of damage to bosses at the edge of the screen with many parts.

Moving the edge of the screen

As described above, the phoenix is best used against the edge of the screen. During many boss battles, you can turn around to change where the edge of the screen is.

Reaiming after shooting

Lancers travel relative to the screen, not the stage. If the camera pans, the projectile follows. You can use this to keep your slow lances directed at a fast target by turning and moving to manipulate the camera.

Lancer switch trick

The cooldown between lancer shots is fixed. You can however:
  1. Open and then close the weapon menu. This lets you shoot again immediately. However, any remaining shot on screen is removed when the menu is opened, and you are defenseless while it is opening. For best results, stand very close to the target.
  2. Use counter force two or three times between shots to fill out the time.

Double counter force

To perform two counter forces in quick succession, do a counter force in the air and land before the animation is complete. The second one will execute automatically.

Counter force abuse

You can use the counter force to remain airborne, gain elevation, and move around in the air. This is useful because you only get one hover per jump and sometimes you need more air time.


Under some circumstances which are poorly understood, you can get stuck in the floor and be ejected to the right. This doesn't help much because scrolling speed is capped, but is useful when you have a phoenix you need to preserve.

Lag reduction

Except for the obvious way of less sprites on screen, lag can be reduced be mashing against the edge of the screen and ducking. Hovering and opening the menu can increase lag. During the outer space stages, lag can be reduced by using zero teleport and counter force.

See also

See also