Altered Beast/Hidden content

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System 16 version

Hidden developer message

AlteredBeast Arcade HiddenMessage.png

Before any of the game demos start, hold down all of the action buttons for both players (Punch, Kick, Jump) to display a developer message written in Roumaji[1].

Mega Drive version

Sound test

AlteredBeast MD SoundTest.png

Press A+C+Up-right+Select on the title screen. Press Up and Down to select a sound, C to play that sound, and Select to exit.

Beast selection

AlteredBeast MD BeastSelection.png

Press A+B+C+Down-left+Select on the title screen. This screen allows the player to choose what beast to transform into on each level.

Famicom version

Debug mode

AlteredBeast NES FreePlay.png

Hold Down and reset the console while on the title screen. "FREE PLAY" will appear on the title screen to indicate its activation, enabling the following options:

Level select

Press Select on the title screen to increment the starting stage number.

Sound test

AlteredBeast NES SoundTest.png

Press Up+Select on the title screen.


Altered Beast
Altered Beast Arcade Title.png

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Books: Sega Game Attack Manual Book Juuouki (1989)
Music: Altered Beast (2017)