
Undertale is an indie role-playing game developed by Toby Fox and released on September 15, 2015, for Microsoft Windows and later ported to Nintendo Switch, PlayStation, and Xbox platforms. The game is set in the Underground, a fictional kingdom beneath Mount Ebott in an unnamed region of North America.
Undertale combines exploration, puzzle-solving, and combat in a unique narrative experience. Players control a human child who has fallen into an underground world inhabited by monsters. The game features multiple endings determined by player choices, allowing pacifist, neutral, and genocide routes through its approximately 6-8 hour campaign.
Undertale won the Golden Joystick Award for Best Indie Game in 2015. The game sold over 3 million copies across all platforms by 2021. Its influence extended to mainstream gaming culture, spawning fan communities, merchandise, and the 2021 sequel announcement Deltarune.
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