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

Submission #4132: Mephistus's SMS Alien Syndrome in 12:58.09

Console: Sega MasterSystem
Game name: Alien Syndrome
Game version: USA/Europe
ROM filename: Alien Syndrome (USA, Europe).sms
Emulator: BizHawk-1.5.3
Movie length: 12:58.09
FrameCount: 46625
Re-record count: 6137
Author's real name: Cassio Maciel
Author's nickname: Mephistus
Submitter: Mephistus
Submitted at: 2013-12-18 02:12:04
Text last edited at: 2013-12-21 08:56:19
Text last edited by: feos
Download: Download (5435 bytes)
Status: published
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Author's comments and explanations:
Alien Syndrome (SMS) Any%

I had the idea of doing a TAS of this game since I started to speedrun it. I got the WR so i wondered what could be improved with it. This is also a not very known game, so it might be a nice contribution to the community.

(Link to video)

Set up

  • Emulator used: BizHawk 1.5.3

Game objectives

  • Aims for fastest time
  • Uses death to save time
  • Genre: Shooter


This is a pretty straightforward game, the objective of each stage is to collect all hostages before you run out of time, then fight the stage boss. I speedrun this game too, the strategy overall its all about doing routes and perfect cornering.

Stage comments


On this stage I have used a death strat, abusing the invencibility after the death respawn, the character can move through the holes on the ground. It saves a bunch of seconds. It takes a while to kill the boss on this stage, i've tried many times to frame-perfect kill him on the first cicle, but it's only possible to take the last hit on the beginning of the second cicle.


The boss on this stage is pretty difficult in a casual play and it was kinda hard on making the TAS strat too. I had to follow his movements frame by frame to make sure I won't miss a hit, also it's hitbox is difficult to reach, since you need to hit it right on the absolute middle.


This stage boss have less invincibility frames than the other ones, and no cicles. Also, there is a point in where you can hit him without getting hit.

Master Alien

This boss was a pain. He has few invicibility frames, but managing to dodge his projectiles while not missing damage frames was a lot of work. He takes 71 hits to die. This took a while.


I use the Flame Thrower (FE) because it inflicts much more damage than the Laser (L) or the Normal Gun (N) on the bosses.

feos: Accepting to Vault and publishing...

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