Most people looking up how to beat sans are stuck on one specific moment rather than the whole encounter, so the phases below are split accordingly.
If something here stops matching what you see on screen, the game has probably changed a value in an update. Most advice on this topic assumes you already know half the answer, which is exactly the problem. There is a fast way and a safe way, and they are not the same thing.
The short answer
Survive the opening pattern without spending resources, then commit hard during the recovery window — that single change solves most attempts.
Phase by phase
Small details matter more than they should here, so read the order of steps carefully. If you are short on time, the first section alone is usually enough. Start with the simplest option before touching anything that is hard to reverse. Nothing below requires mods, paid tools or an account on some sketchy site.
Most advice on this topic assumes you already know half the answer, which is exactly the problem. The approach below has been checked against the current version rather than a patch from two years ago. There is a fast way and a safe way, and they are not the same thing.
Before you start the attempt
If you are short on time, the first section alone is usually enough. Greed is what ends most attempts here, not the damage output. The approach below has been checked against the current version rather than a patch from two years ago.
- Back up your save if the game gives you the option.
- Check the version you are running before following any step-by-step advice.
- Write down what you changed, so you can undo it if the result gets worse.
- Test one change at a time instead of five at once.
- Restart fully after a change rather than trusting a quick reload.
Cleaning up the run
The community figured most of this out through repetition, and the pattern has held up well. Start with the simplest option before touching anything that is hard to reverse. If something here stops matching what you see on screen, the game has probably changed a value in an update. Give the first attempt an honest try before deciding the method does not work.
Most advice on this topic assumes you already know half the answer, which is exactly the problem. If something here stops matching what you see on screen, the game has probably changed a value in an update. Learn the tell for the heavy attack first; everything else can be reacted to.
Mistakes worth avoiding
- Changing several settings at once, then having no idea which one helped.
- Following a guide written for an older version and assuming nothing moved.
- Skipping the preparation step because it looks boring, then repeating the hard part four times.
Frequently asked questions
Can this be done at a lower level?
Yes, and people do it regularly. It takes longer and leaves less room for mistakes, but nothing about the encounter requires overleveling.
Is there a cheese strategy?
There is usually one, and it usually gets patched. The route above keeps working because it relies on the encounter design rather than a bug.
Is there a faster method?
Usually yes, and usually it is riskier. The route above trades a little speed for a much lower chance of having to start over.
How to Beat Sans is not complicated once the order of operations is clear, and now it is.