Alien Soldier is an arcade-style 2D run & gun game developed by Treasure Co., Ltd. and published by SEGA. It was released on cartridge for the MegaDrive in both Japan and Europe, but the US release was exclusive to the SEGA Channel online service addon for the Genesis.

In game, you take control of Epsilon Eagle, the former leader of a terrorist group named Scarlet which prevents the Earthen populous' ability to traverse space with an iron fist.

Each member of Scarlet aren't really alien, but rather humanoid/creature fusions, the result of an artificial parasite.

A failed assassination attempt leaves Epsilon mortally wounded and cast through time and space, where his conscious and energy would end up in a boy in a secret lab full of kidnapped children.

Through the eyes of that boy, Xi-Tiger, who in the confusion following the failed assassination on Epsilon gained the powers of the strange mutagen, hold captive and ultimately kill a girl to tempt Epsilon out of hiding.

As Xi-Tiger fled, the boy which Epsilon possessed morphed into Epsilon himself out of pure rage. Now fueled by the conscious and human sense of justice inherited from the boy, Epsilon sets out to right his wrongs by killing Xi-Tiger and destroying the organization he once lead.

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 "[u]alien-soldier-6-button-toggle.ips[/u]," but if you are particular, then there are two different configuration decisions to make (see below.)

[u]Complete list of changes[/u]:

- 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 [url=http://www.romhacking.net/utilities/240/][u]Lunar IPS[/u][/url] 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).

[u]Variants[/u]:

- "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.

[u]Changelog[/u]:

v1.4

- fixed error some keyboard users encountered where left+right at the same time triggered a mode button press (thanks, [url=/community/2797/][u]Ti[/u][/url]!)

v1.3

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

v1.2

- corrected hybrid counterforce text in controls menu

v1.1:
- 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

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

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