Undertale Yellow
Team UtopiaGrab your cowboy hat and a Missing Poster, because Undertale Yellow drops you into the Underground as Clover, the seventh human to fall. This fan-made prequel to Toby Fox’s Undertale is free to play online in your browser, and it’s a full-length RPG, not a short demo. You’ll dodge bullet patterns, decide who lives, and travel down one of three main story routes. It’s the kind of project fans waited seven years for, and it finally landed.
If you loved sparing monsters in the original, Undertale Yellow keeps that heart but adds a circular shooting target, new areas, and over one hundred music tracks. đ¯
- Free fan-made prequel to Undertale, playable in-browser
- Three branching routes: Pacifist, Neutral, and Genocide
- New circular target combat replaces the classic FIGHT bar
- Brand new characters like Martlet, Dalv, Ceroba, and Starlo
What Is Undertale Yellow?
Undertale Yellow is a turn-based role-playing game built as an unofficial prequel to Toby Fox’s Undertale. It’s directed by Master Sword and developed by Team Undertale Yellow using GameMaker: Studio. The story follows Clover, the Yellow (Justice) SOUL, who jumps into Mt. Ebott to find five missing humans. Clover is actually the seventh human to fall into the Underground, and their SOUL would be the sixth one collected by King Asgore. Toby Fox gave a casual green light to the fan project, so it exists with his blessing.
Playing it through a browser build felt smooth on my laptop, with crisp pixel art and instant loading between rooms. The soundtrack alone, packed with remixes and new themes from NoteBlock and MyNewSoundtrack, makes it worth booting up. This title carries the same humor and emotional punch fans expect from the Undertale universe.
A Seven-Year Journey to Release
Undertale Yellow had one of the longest development stories in fan-game history. The project was first announced in February 2016, just months after Undertale itself blew up. A short demo dropped in November 2016, giving fans an early taste of Clover’s world. Then came years of quiet work, team changes, and steady polishing behind the scenes. The full game finally launched on December 9, 2023, almost eight years after that first announcement. That’s a lot of patience from both the team and the fans!
Gameplay in Undertale Yellow
The core loop will feel familiar if you’ve played the original: explore, talk, solve puzzles, and enter turn-based battles. The big twist is the new FIGHT system. Instead of stopping a sliding bar, you watch a white ring shrink toward the center of a circular target. The closer to the middle you stop it, the harder you hit, but going all the way in counts as a miss.
Dodging works just like before. Your SOUL bounces around a small box dodging bullet patterns each monster throws at you. You can still SPARE every enemy, fight them all, or do anything in between. Those choices shape which of the three routes you end up on.
FIGHT System Deep Dive: Mastering the Shrinking Ring
The new circular target totally changes how battles feel compared to Undertale’s sliding bar. In the original, you just timed a left-to-right swipe near the edge for max damage. Here, the ring shrinks inward, and you stop it as close to the bullseye as possible. A perfect center hit can deal up to double the damage of a sloppy outer hit. But push your luck too far and the ring collapses into a total miss, costing you a turn. Against bosses with armor or multiple phases, this means you’re trading risk for reward every single attack. Try practicing on early Snowdin enemies to learn your timing before facing Martlet or Ceroba. Once you feel the rhythm, the system feels even more skillful than the original.
Story and Routes
The plot picks up long after monsters were sealed under Mt. Ebott. Clover heads up the mountain with a Missing Poster, hoping to find the humans who vanished before them. Down in the Underground, they team up with Flowey, who offers to SAVE for them, just like old times.
Undertale Yellow splits into Pacifist, Neutral, and Genocide routes, and each one tells a noticeably different story. Technically there are four endings, because the Neutral route branches into two different conclusions based on smaller choices you make along the way. You’ll meet new faces like the nervous bird monster Martlet, the mysterious Dalv, the warrior Ceroba, and the cowboy-obsessed Starlo. Returning characters appear too, but the focus stays on Clover’s path through fresh territory.
Which Route Should You Play First?
Each route has its own length and difficulty curve, so picking an order matters. A first Neutral run usually takes 8 to 12 hours and is the easiest entry point. Pacifist runs around 12 to 15 hours and is the most rewarding, with the deepest story and toughest sparing puzzles. Genocide is the hardest by far, packed with brutal boss fights and a darker mood, and it takes 10 to 14 hours. Most fans recommend playing Neutral first, then Pacifist for the full emotional payoff, and Genocide last if you can stomach it. That order lets each ending hit the way the team designed it. Save your file before big choices so you can branch without restarting!
New Locations and Puzzles
The Underground gets bigger here. You’ll explore the Dark Ruins, a damaged, gloomier version of the Ruins with its own exit to Snowdin. There’s also The Dunes, a desert-style region, plus expanded takes on Snowdin, Hotland, Steamworks, and New Home. Each area has its own puzzles that ask you to think, not just react.
Puzzles range from quick logic challenges to longer sequences tied to a region’s theme. Clover even has a UGPS mail system that drops letters from past pals as you travel. It’s a small touch that makes the world feel lived-in.
Music and Visuals
The soundtrack covers over one hundred tracks, with new pieces and remixes of old favorites. Master Sword directed the music, and the team behind it includes well-known names in the Undertale remix scene. The pixel art keeps the original’s style but adds richer environments and brand-new sprite work for every new character.
How to Play Undertale Yellow
Getting started is simple. Open the game in your browser, watch the intro, and start guiding Clover through the opening area. You’ll learn the basics quickly: walk around, interact with NPCs, and try a few practice fights before the difficulty climbs.
Undertale Yellow leans a bit harder than the original, so it’s recommended for players who already finished Undertale at least once. Save points appear regularly, and you can RESET anytime if a route goes sideways.
Browser Saves and Performance
The browser version stores your save data inside your browser’s localStorage, not as a separate file on your computer. That means your progress sticks around between sessions as long as you use the same browser and don’t clear your site data. Clearing cookies or switching to a different browser will wipe your save, so be careful. Loading times are usually under five seconds on a normal laptop, and room-to-room transitions feel instant. If you want a save file you can back up or move between devices, the downloadable Game Jolt build is the safer pick. For most casual runs, though, the browser handles everything just fine.
Controls for Undertale Yellow
Use the arrow keys to move Clover around. Press Z or Enter to confirm and talk, X to cancel or open the menu, and Shift to run and skip text faster. Full xinput gamepad support is included if you’d rather plug in a controller. Accessibility options like No Screenshake, Auto-Fire, Easy Mode, and Auto-Rhythm are tucked into the settings.
Tips and Tricks for Undertale Yellow
- Stop the shrinking ring as close to the bullseye as you can; near-center hits deal way more damage than outer ones.
- Talk to every monster in battle before deciding. ACT options often reveal the right way to SPARE them.
- Save before boss fights, especially on the Pacifist route, since some encounters have multiple phases and unique dodge patterns.
- Turn on Auto-Rhythm in the accessibility menu if a music-based boss is wrecking you. It’s there to help.
- Explore every room twice. Hidden items, lore notes, and UGPS letters are easy to miss on a first pass.
Key Features of Undertale Yellow
- Three full story routes with four total endings based on whether you spare or fight
- Circular target FIGHT mechanic that rewards precision aiming
- Brand new cast including Clover, Martlet, Dalv, Ceroba, and Starlo
- Over one hundred original and remixed music tracks
- Accessibility options like Easy Mode, No Screenshake, and Auto-Fire
Where to Play Undertale Yellow
The easiest way to dive in is through your browser, completely free, with no installation needed. The official downloadable version is hosted on Game Jolt and IndieDB, and any other download source could be risky, so stick to those if you want the offline build. On Arcadino, you can launch Undertale Yellow instantly without sign-ups or wait times.
There’s no official mobile port or Mac version right now. Some fans have found workarounds for running the .exe on other systems, but those aren’t official. PC players using Windows get the smoothest experience, and a controller works great if you have one handy.
For Parents
Undertale Yellow is best suited for kids around 10 and up who already know Undertale. It carries the same themes of choice, mercy, and consequence, but the difficulty is slightly higher and some routes get pretty dark. There’s no chat, no in-app purchases, and no ads inside the game itself. A single route takes several hours, so it’s a meaningful play session rather than a quick browser snack.
Similar Games to Undertale Yellow
If you enjoy Undertale Yellow’s mix of bullet-dodging combat, branching choices, and quirky monster friends, these picks scratch the same itch.
- Undertale – The original turn-based RPG that started it all, with the same Fight-Spare system.
- Deltarune – Toby Fox’s follow-up project featuring party-based combat and a new cast.
- Omori – A surreal RPG about emotions, dreams, and tough choices.
- Lisa: The Painful – A dark side-scrolling RPG where every choice has heavy consequences.
- More Adventure games
FAQs About Undertale Yellow
Is Undertale Yellow free?
Yes, Undertale Yellow is completely free to play. It was made as a fan project, with no purchase needed on browser or through the official Game Jolt download. The developers built it as a love letter to Undertale fans, not a commercial product.
Is Undertale Yellow canon?
No, Undertale Yellow is not officially canon to Undertale. It’s a fan-made prequel that Toby Fox loosely approved, but it isn’t part of his official storyline. Fans still treat it as a meaningful extension of the world.
What is Undertale Yellow?
Undertale Yellow is a fan-made prequel RPG to Toby Fox’s Undertale. You play as Clover, the Yellow SOUL, exploring the Underground before Frisk arrives. It uses turn-based combat with a new circular shooting target and offers three story routes.
How long is Undertale Yellow?
A single route takes most players around 10 to 15 hours. Completing all three routes adds many more hours of new dialogue, bosses, and endings. The full game is comparable in length to the original Undertale.
How do you play Undertale Yellow?
Open the game in your browser and use arrow keys to move Clover. Press Z to confirm, X to cancel, and Shift to run. In battle, choose to FIGHT, ACT, use an ITEM, or SPARE monsters.
Why is Undertale Yellow so different?
It changes the FIGHT system to a shrinking circular target instead of a sliding bar. The dodging system stays the same as Undertale, but new areas, characters, and routes give it its own identity. Clover also has a gun and a cowboy hat, which sets the tone.
How do you fullscreen Undertale Yellow?
Press F4 to toggle fullscreen mode in the downloaded version. In a browser, use your browser’s fullscreen option, usually F11. Both options work fine without affecting the controls.
Are there accessibility options in Undertale Yellow?
Yes, there are several built-in accessibility features. Options include No Screenshake, Auto-Fire to reduce hand strain, Easy Mode to take less damage, and Auto-Rhythm to simplify a tricky music-based boss.
Final Thoughts on Undertale Yellow
Undertale Yellow nails what made the original special while carving out its own voice with Clover’s story, the circular target combat, and a soundtrack that holds its own next to Toby Fox’s. Three full routes give it serious replay value, and the new cast feels like it belongs in the Underground. Pull up the browser version, point Clover toward Mt. Ebott, and find out which ending you can live with. đ¤