Undertale AI mini apps

play for all the characters purely according to the canon.

An atmospheric AI bot for roleplay stories in the Undertale and Deltarune universes.

Interactive visual novel Undertale: Radiotale. Survive radioactive storms, gather mushrooms for antirad, pass Undyne’s trial of spirit, and unlock the true ending with Mutagen Dreemurr!

AI assistant that helps create and generate custom Undertale mods including sprites, dialogue, battles, and game mechanics.

Multilingual AI bot for Undertale and Deltarune roleplay scenes with memory.

Sans the Skeleton (Undertale) Trap in underground

An epic battle with Sans from Undertale with a real storyline, phases, and canonical dialogues. Dodge bones and blasters in this atmospheric bullet hell.

Battle Sans, Papyrus, and other bosses in this Undertale-inspired bullet hell game. Now with better hitboxes and stable game speed!

Chara from Undertale — the first fallen human, speaking with eerie calm, dark humor, and unsettling determination.

omg you can talk to sans undertale at 3AM now aaaaaaaaaaaaaaaaaa

A passionate Undertale AU fan who loves deep-diving into alternate universes, lore, and fan theories with infectious enthusiasm.

A kind, silent, notebook-writing pacifist Frisk from Undertale.

2D RPG based on Dusttale: follow Dust Sans through the Ruins, Snowdin, Waterfall, Hotland, the Core, and the Barrier, gaining LV.

A multiplayer Undertale-style bullet hell game. Survive 5 phases against the Inner Skeleton boss with a friend in local co-op mode.

Upload your favorite songs, use your mic, or capture system audio to watch a 3D glowing cube react. Features hidden Undertale & Fire themes depending on the track name!

Survive a 7-minute battle with Time Paradox Sans! Dodge attacks, defeat the clones, and uncover the true ending with credits.