Players explore the underground from a top-down perspective, moving through towns, dungeons, and scripted events to advance the story. Battles use a turn-based command system where you can attack, act, use items, or choose mercy; during enemy turns, a heart-shaped soul must dodge bullet-hell style attacks. Many encounters can be resolved peacefully through dialogue or specific actions, and routes and endings shift according to the player's choices.
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Frisk
The silent human protagonist controlled by the player after falling into the underground.
Toriel
A kind monster who guides and protects the protagonist in the Ruins.
Sans
A laid-back skeleton with a joking manner and important story knowledge.
Papyrus
An energetic, earnest skeleton who wants to join the Royal Guard.
Undyne
A fiercely determined fish-like warrior who aggressively pursues the protagonist.
Alphys
The nervous royal scientist involved in key events.
Asgore
The king of the underground and a central figure in the story.
Flowey
A strange flower character known for interfering with the player's choices and the narrative.
Learn enemy attack patterns before committing to offense or mercy choices. Many common encounters can be cleared without fighting by using dialogue, compliments, waiting, or meeting specific conditions, and avoiding unnecessary battles has a major effect on the route and ending. During combat, pay close attention to attack cues and keep movement controlled, especially against multi-phase patterns. Save often so you can revisit areas and experiment with different choices.
No cheats or unlockables available
Tips and tricks
Try different dialogue and mercy options; many enemies have non-combat solutions.
Tips and tricks
Read the enemy's attack description before deciding your action each turn.
Tips and tricks
Save before entering new areas so you can handle unexpected tough fights.
User Reviews
The pixel art and music are instantly memorable, and the retro remake style feels cohesive.
User Reviews
The pacifist route and branching choices make repeat playthroughs feel fresh.
User Reviews
Simple combat with a strong identity; the bullet-dodging sections can be genuinely tense.
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About Undertale
Undertale is a 2026 Game Boy rpg, adventure, turn-based combat game, developed by Toby Fox and published by Toby Fox. This Game Boy Color-style reimagining of Undertale preserves the original's pixel storytelling, humor, and memorable cast. Created by Toby Fox, it centers on exploration, turn-based battles, and dialogue-driven choices, with a strong emphasis on the idea that enemies can often be spared. Built under retro hardware constraints, this version drew attention… You can play Undertale instantly in your browser at https://www.classicemu.com — no downloads or installation required, with cloud save support and mobile touch controls.
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Start Undertale directly on this page with ClassicEmu. The emulator runs in your browser, so you can play online without installing a desktop emulator first.
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Undertale is listed under Game Boy so players can find it alongside games from the same console, handheld, or arcade system.
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