Bad Time Simulator is a fan-made indie game inspired by the popular RPG Undertale

Bad Time Simulator is a fan-made indie game inspired by the popular RPG Undertale, specifically recreating the challenging boss fight against Sans. Developed by Joe Zeng, the game focuses entirely on testing the player’s reflexes, timing, and concentration through a fast-paced combat system. Unlike traditional role-playing games, there is no exploration or story progression—players are immediately thrown into an intense battle scenario.