Altergeno

\* This article contains information that is from a cancelled AU, an AU that has been put on an "Indefinite Hiatus", or an AU that has not had a story update in a year. As such, some information here may not be found in any established story, and could be considered non-canon.
Time of Last Story Update: July 3, 2020
Time of Cancellation: May 11, 2022

### Link/s

AO3 (Story)
Scratch

## Contributors

### Artist/s

VectorV0VectorV

**Altergeno** (stylized AlterGeno or ALTERGENO) is an AU created by VectorV that follows Alphys and the surviving monsters in the True Lab after a Genocide Route aborted at the final Flowey encounter. However, they all disappeared without a trace.

This AU stems from the idea that Chara appearing at the end of the Genocide route splits Frisk's determination, giving Flowey the ability to SAVE. This is exploited to bore Chara out of her mind and end up not erasing the world on a Genocide Route.

The AU will be rebooted at Altergeno v2.0 once there is enough story written for it.

## Characters

### Undertale Characters

#### Alphys

The main character of the story. Leader of the Underground. Otherwise identical to Alphys in Undertale.

#### Monster Kid

One of the main characters. Lives in the True Lab like all the other evacuated monsters.

#### Grillby

A supporting character. Is non-verbal for the most part (he has a few lines) however is a major helping hand. His main job is handling food, as that is what he is used to.

#### Frisk

The main antagonist of this AU. Frisk is the main threat that everyone in the True Lab is hiding from. Frisk is extremely violent, attacking anyone on sight.

#### Chara

Most of the time, Chara is part of Frisk, like in Undertale. However, sometimes Chara leaves Frisk's body for one reason or another, like at the end of Undertale's Genocide Route when they erase the world. Frisk's determination is halved while Chara is present. They exist more as a mechanism for Flowey's intermittent ability to SAVE, than as a character themselves, however they are going to appear in a currently unfinished chapter.

#### Flowey

A minor villain or supporting character (somewhat of mixed feelings about the survivors) Has exactly 50.001% of Frisk’s determination, thus when Chara appears and splits Frisk’s determination equally, Flowey has the ability to SAVE.

#### River Person

*This character is only in a variation of the AU, not in the base AU itself.*

In Altergeno: Alter Timeline, which is a crossover of Altergeno and Dusttale, and in Vector's headcanon in general, River Person is Gaster's brother, and shares some of Gaster's powers, such as interdimensional travel. River Person caused the whole Alter Timeline by teleporting everyone in Altergeno to another AU, in this case Dusttale.

### Added Characters

#### Velma

Monster Kid's mother. Evacuated to the True Lab like all the other surviving monsters, and is a major character.

## Locations

### Undertale Locations

#### True Lab

The main setting of this AU. Acts as a safe place and a bunker for the surviving monsters.

#### New Home

The former capital of the Underground, and the setting of the prologue.

* Only "main" locations/characters are shown here.

## Story

* Chapter 1
* Chapter 2

## Trivia

* The number 576 comes from Vector misremembering the number of tries (536) in Aftertale.
* The color palette of the logo comes from the True Lab combined with red (symbolizing death. Vector: "I think grey would suit monsters more, but red is what comes to mind and it contrasts the green of the True Lab").