As of 2026, the most reliable and feature-complete free simulators are fan projects hosted on platforms like , GameJolt , or personal portfolios. Note: These are fan-made , not official Toby Fox releases.
Note: Always be careful when downloading files from the internet. Stick to reputable fan sites like GameJolt or well-known Undertale community hubs.
: A highly accurate Scratch-based simulator optimized for performance. It features the intro, soul segments, and full attack patterns.
