Undertale Yellow is a free fan-made prequel to Toby Fox's 2015 RPG Undertale. Developed over about seven years by Team Undertale Yellow and released in December 2023, it was widely praised for matching the original's humor, music and heart, and Toby Fox himself congratulated the team. You play as Clover, the sixth human to fall into the Underground, years before the events of Undertale.
How to Play Undertale Yellow: Rules and Objectives
Explore the Underground, talk to its residents and solve puzzles as you search for a way home. Battles use Undertale's unique system: when an enemy attacks, you control a small heart (your soul) in a box and dodge bullet patterns. On your turn you can attack, act, use items or show mercy.
- Yellow Soul: Clover's soul represents justice. In some fights it can shoot back, giving battles a different feel from the original game.
- Mercy Instead of Violence: Using ACT options such as talking or complimenting can calm monsters so you can spare them.
- Routes: Your choices about sparing or fighting shape the story, characters' reactions and the ending you see.
- New Areas and Characters: Visit places like the Dark Ruins, Snowdin, the Dunes and the Steamworks, and meet companions like Martlet, Ceroba and Starlo.
Controls and Movement Guide
- Move: Arrow keys.
- Confirm / Interact: Z or Enter.
- Cancel / Back: X or Shift.
- Menu: C or Ctrl.
- In Battle: Move the soul with the arrow keys; in shooting segments, press Z to fire.
Proven Strategies and Pro Tips
- Read Every ACT Option: Each monster responds to different actions. Checking an enemy often hints at how to spare it.
- Save Often: Glowing save points restore health and record your progress. Use them whenever you see one.
- Watch Attack Patterns: Bullet patterns repeat. Learning them makes boss fights much easier.
- Stock Healing Items: Buy food in shops before difficult areas so you can recover during long fights.
Cognitive and Educational Benefits
- Empathy and Choice: Sparing enemies encourages players to think about the consequences of their actions.
- Reading Comprehension: The story is told through dialogue, rewarding careful reading.
- Puzzle Solving: Environmental puzzles train logic and observation.
A Fan Project That Earned Its Praise
Fan games are common, but few reach the level of polish of Undertale Yellow. Its developers created a full-length adventure with original music, new characters and battles that feel true to the original while still trying fresh ideas. Clover's story explains events hinted at in Undertale and gives players a new perspective on the Underground. It is entirely free and non-commercial, made out of love for the original game. For fans of the franchise, it is an essential experience; for newcomers, it is a great introduction to the series' humor and heart.
Frequently Asked Questions (FAQ)
Do I need to play Undertale before Undertale Yellow?
It is not required, but many story moments and surprises have more impact if you already know the original game.
Can I play Undertale Yellow on a school Chromebook?
Yes. This version runs in the browser with no download or installation.
Does the game save progress automatically?
No. You must save manually at save points. Saves are stored in your browser's storage on that device.