Games Like Bad Time Simulator: More One-Boss Fights and Bullet Hell

The Sans fight is a bullet-hell game with a single boss and no scoring. If that is the part you liked, the games below are the closest things on this site, sorted by what they share with it.

One boss, one fight

Just One Boss is the purest match: a single arena, a single enemy with phases, and a pattern that gets faster as it goes. Cuphead: Aviary Action is a fan tribute built around one bird boss, and its parry mechanic gives you the same "stand still at the right moment" tension as a blue bone.

Dodge everything

Space Invaders and Invaders.io are the grandparents of every bullet pattern in the Sans fight. Flappy Bird is one input and a gap, which is a bone gap by another name. Geometry Dash is the same memorise-the-sequence loop set to music, and the practice mode works the same way.

Famous for being unfair

The World's Hardest Game 2 asks you to move a square through blue dots and is exactly as honest as its name. Level Devil lies to you on every screen and is the funniest thing here. The Impossible Quiz punishes the obvious answer the way a blue bone punishes the obvious dodge, and Getting Over It is a hammer, a pot and a mountain that will send you back to the start after an hour.

Horror with the same nerves

Five Nights at Freddy's is a survival game about managing a resource (power) while things come for you, which is Karmic Retribution with a camera feed. The later nights are as scripted as the Sans fight and can be learned the same way.

Where to start

If you want another boss, Just One Boss. If you want the dodge feeling without a boss, Space Invaders. If you want to be angry at a platformer, Level Devil.