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Alien Soldier: 6-Button Controller Support

Hack of Alien Soldier


This hack adds support for 6-button controllers, while retaining legacy support for 3-button controllers. Depending on whether a 3-button or 6-button controller is inserted into the console, a different control scheme will be used.

The recommended variant is “alien-soldier-6-button-toggle.ips,” but if you are particular, then there are two different configuration decisions to make (see below.)

Complete list of changes:

  • You can now dash by pressing Z. (Down+C no longer dashes in 6-button mode.)
  • You can now perform the “Counter Force” parry manoeuvre by pressing Y. (Double-tap B no longer parries in 6-button mode.)
  • You can now toggle shoot modes by pressing X or Mode at any time. (Down+A no longer swaps shoot mode in 6-button mode.)
  • The new controls are displayed in the “control test” screen, assuming a 6-button controller is inserted.
  • On the password input screen, pressing up now increments the number and down decrements. Furthermore, A, B, and C can now all be used to confirm password.
  • Bypasses internal checksum verification and region lock.

You can use Lunar IPS to apply the hack to your Alien Soldier (JP) ROM file. Please note that only the Japanese ROM is supported (but it should still run on consoles in other regions).


  • “Hold” vs “Toggle”: In the “Hold” variant of the hack, the shoot mode is only temporarily changed by holding X. (It can still be toggled with the Mode button, however.) This is useful if your controller has shoulder buttons, or for some keyboard layouts. However, it’s inconvenient for standard 6-button controllers.
  • “Hybrid” variants accept the original 3-button control combo-inputs in addition to the new 6-button controls. This is useful for those with strong muscle memory of the original game. However, it is not recommended for most players due to the likelihood of accidentally triggering an unintended input.



  • fixed error some keyboard users encountered where left+right at the same time triggered a mode button press (thanks, Ti!)


  • fixed demo (broke in v1.1)
  • password entry can confirm with a, b, or c (instead of just c as in the base game)


  • corrected hybrid counterforce text in controls menu


  • added “hybrid” variant
  • fixed a bug in the hold variant where pressing or releasing X during hitstun toggles shoot mode like pressing Mode would.
  • fixed dash and shoot mode inputs in certain late-game sections

ROM / ISO Information:

  • Database match: Alien Soldier (Japan)
  • Database: No-Intro: Genesis (v. 20210226-213851)
  • File/ROM SHA-1: 8F6EB584ED9487B8504FBC21D86783F58E6C9CD6
  • File/ROM CRC32: 90FA1539



RHDN Hack ImageRHDN Hack Image


ContributorType of contributionListed credit
TiHackingFixed keyboard left+right error