The VHS aesthetic reinforces this idea of "glitchiness" and corruption. In a standard fight, Sans is already breaking the rules of the game (dodging attacks, attacking in the menu, ignoring invincibility frames). When you apply the VHS filter, you are visually representing his corruption of the game code.
These simulators are usually browser-based games or downloadable projects created by fans on platforms like Scratch, Game Jolt, or Itch.io. They aren't official products, but rather community-driven attempts to answer the question: How much harder and creepier can this fight get? vhs sans fight simulator
The original Sans fight in Undertale is renowned for its difficulty, its meta-commentary, and its emotional weight. But what happens when you take that high-octane bullet-hell experience and drag it through a CRT screen? You get the VHS Sans Fight Simulator: a love letter to the 1990s, a horror-tinged reimagining, and a distinct challenge that appeals to speedrunners, nostalgia seekers, and creepypasta fans alike. The VHS aesthetic reinforces this idea of "glitchiness"