Undertale Black is- IS NOT RAGE SOUL- is a fangame project aiming for a scale similar to Undertale Yellow. It serves as a prequel to the original Undertale, exploring the butterfly effect — how even the smallest change can lead to an entirely different story.

Is it an AU?
I guess so. While all the characters are original and the game tries to be, but isn't canon, the characters are intended to exist in the original Undertale Universe. The twist is that their histories unfold in very different ways from what would happen in the original universe, so while it isn't a swap or something like that, it isn't the same timeline that UT.

Its core lore is a parody of Deltarune's, with the central theme of Undertale Black being 'Forget'. All the Routes embodies a different take on that.

I'm in the phase of: "I have even more OST titles (yes titles, the vibes, the title, maybe knowing how to hum it, but not actual .ogg) than Undertale, and all this cool stuff like main lore and characters, all done, what is left to do is just set down the lesser details, sprites, learn how to compose the actual songs, start learning how to program, and literally everything xd"

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CURRENT REVEAL:

• Revealed Characters (Main, Secondary, Enemies, NPCs, etc.): 16/59 (current total, subject to increase)
• Skills Progress:
  • Pixel Art: Done. Need to master asymmetric sprites and start working on animated sprites.
  • Music Composition: Learning. Have composed a few; looks like I have potential. Everything’s going well for some first tries without many tutorials.
  • Programming: ... Absolutely nothing.
• Current TOTAL revealed (characters, lore, progression, gameplay mechanics, fun facts, OST titles, etc.): approx. 2% lul

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⚠️PS: Most characters remain unrevealed — only early or minor ones are shown — to avoid spoilers or potential character theft in case the game is fully developed. Some exceptions can occur because I'm stupid⚠️