ExperimentTale Idea: Part 1
So, Iâve been making my own fan Undertale AU for a while now, and with all thatâs going on in the world I wanted to share it soon. Iâm planning on turning it into an animated series once I get the right software and tools and get enough experience to do so, so Iâm not gonna be able to go into all the details about the AU. But I thought I should at least get the idea out here before someone else has a very similar one or something, if that makes sense.
The name is ExperimentTale, kind of a lazy name but it fits. Before the human and monster war, Gaster and a human woman named Rose were very close friends. They were cute and Gaster was awkward cuz he was crushing, and eventually he asked her out. She said yes and their relationship spiraled even more. Then the war happened, Rose had to pick which side she wanted to stand by since she was a human but loved a monster. She chose to protect monsters and fought by their side, throughout that time her relationship with Gaster strengthened.
The humans on the opposite side were losing, so they found another way to take out monsters. They would take monsters prisoner, do some very unpleasant things to them, and create hybrids. The monster was killed after the process and the hybrid was raised in a strict violent atmosphere, the hybrids were taught to hate monsters and were sent out to do their damage. That made the humans start winning, but it also got risky because the hybrids were pretty unstable in that type of environment. The hybrids started attacking the humans keeping them, which did a bit of damage. The humans decided that they were already winning and had no use for the hybrids anymore, so they exterminated them.
After a while longer, the humans won. Like the game Undertale explained, the humans sealed monsters underground with a magical spell. Rose stayed with them. Gaster protested a bit because he didnât want Rose suffering more, but she insisted.
More time passed, Gaster and Rose find a home, Asgore gives Gaster his title as Royal Scientist, and at some point it is discovered that Rose is pregnant. Asgoreâs furious because heâs king and has seen what hybrids did, Toriel is worried but doesnât want anyone to get hurt just yet, and Gaster is protective as hell towards Rose and the baby. After some debate, theyâre allowed to keep the kid.
They name her Ava.












