Fan made Undertale prequel with choice driven RPG play
Undertale Yellow for Windows is a free-to-play adventure RPG built as an unofficial prequel to Undertale. It follows Clover, a human who travels to Mount Ebott after hearing that people have disappeared there. From that setup, the game sends players into the Underground, where monsters remain separated from humans by a magical barrier.
The core appeal is its choice-based storytelling. Like Undertale, it uses turn-based encounters where violence is not the only option, and your decisions help shape the route you take. The game includes Neutral, Pacifist, and Genocide paths, so relationships can change depending on how you treat the characters you meet. This gives the story a personal feel without making the controls or systems overly complex.
Undertale Yellow also expands the setting with new areas, puzzles, and a fresh cast of characters. The writing keeps a playful, humorous style while adding more background to the world’s history. Puzzle sections add light problem-solving between story moments and battles, making the experience feel more varied than a simple narrative game.
The soundtrack is another strong point, with more than 100 tracks made up of original music and remixed familiar themes. For fans, this helps the prequel feel connected to the original while still having its own identity.
There are some caveats. The game is likely most rewarding if you already know Undertale, since it includes spoilers and some story details may not land as well for newcomers. It is also described as a bit more difficult, and some players have reported occasional crashes.
Overall, Undertale Yellow is best for Undertale fans who want a thoughtful fan-made expansion of the universe, with meaningful choices, new locations, and a strong musical package. New players can still enjoy it, but they may appreciate it more after experiencing the original game first.
