Cakeey really found one of these guys and stuck with the voice
234TS!Underswap is a fan-made Undertale game developed by Team Switched. It’s inspired by the classic Underswap AU, but with a major difference — instead of changing characters’ personalities, this version only swaps their roles in the story. That means familiar faces like Flowey and Temmie act the same as you remember, but take on totally new positions in the game’s world. It creates a refreshing and surprising experience that still feels faithful to the original Undertale tone.
The gameplay has also been upgraded with quality-of-life improvements, new visuals, and a more modern feel — drawing inspiration from Deltarune. There's a journal system to help track progress, reworked puzzles, and some really fun surprises in how the world is structured.
The current demo includes the Ruined Home and Starlight Isles, with more planned in future updates. You can play it on Windows, Linux, and Android.
Whether you're a longtime Undertale fan or discovering this AU for the first time, TS!Underswap offers a familiar but flipped experience that’s definitely worth checking out.
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Currently, Pixilworldians has 1,330,349 views for Undertale across 315 videos. His channel currently has around 1 hour worth of content for Undertale, less than 0.32% of the total video content that Pixilworldians has uploaded to YouTube.