Bad Time Simulator is a fan-made game where you dodge Sans' brutal attacks in intense battles. Practice, survive, and test your reflexes in multiple game modes.

Undertale Survival Challenges

Story and Setting

In Undertale, players can choose to follow several different routes, including the Genocide Route - a path to slaughter all creatures in the underworld. If you choose this path, you will have to face Sans in the final battle. Bad Time Simulator simulates that battle exactly, bringing an extremely challenging experience for players.

Gameplay

Control a small heart (representing the character's soul) and have to dodge a series of attacks from Sans. Attacks include bones, lasers, and Sans' teleportation ability, all of which require extremely good reflexes, concentration, and patience. You will also find Trigonometry Dash which has many game modes as well.

Game Modes in Bad Time Simulator

Normal Mode

This mode simulates the entire battle between the player and Sans as in the original Undertale. All attacks will take place in the same order as in a real match, no interruptions, no mercy.

For: players who are familiar with the pace of the match, want to challenge themselves at the highest level.
Difficulty: very high, even a small mistake can lead to failure.

Practice Mode

Allows you to choose each separate attack of Sans to practice dodging skills. This is a great mode for beginners or those who want to practice reflexes in specific parts.

For: players who want to learn slowly, not pressured by the whole match.
Benefits: improve skills gradually, easily recognize weaknesses.

Endless Mode

In this mode, Sans' attacks will continue without end, and are often randomly mixed. The goal is to survive as long as possible.

For: players who want to practice endurance and focus.
Notable features: feels like a survival test - whoever lasts longer is better.

Single Attack Mode

In this mode, you will choose a specific attack and face it only once. Ideal for those who want to understand a move in depth or for light entertainment.

For: intensive practice, testing specific evasion tactics.
Advantages: highly focused on a small aspect.

Custom Attack Mode

Allows you to create or choose your attack combination based on available moves. This is the most creative, flexible and engaging mode in the game.

For: players who want to design their challenges or simulate their favorite stages.
Highly personalizable: each person can create a completely different experience.