Q&A for How to Beat Sans in Undertale

Try using an computer emulation of the Sans fight so that you can practice before the real thing. Try to memorize his battle pattern and always pick attack so that it progresses.

If you want to see the alternate timeline, want to beat all routes 100%, or beat Sans for the thrill of it, go ahead. If you're into the game for just the community and would just rather watch a YouTuber or someone else do it, do that instead.

Try to dodge his attacks. If it fails, try to move away from the bones and blasters.

There is a twist on the last attack. If you beat the second to last one, the last will be easy.

Yes. It is the same with all the battles in Undertale.

Even if beating Sans without getting hit is possible, it is extremely difficult and you would need to practice a lot.

In order to dodge the orange bone, or almost anything colored orange in Undertale, you must be moving when the attack hits you.

Omega Flowey can only be battled on the Pacifist and Neutral Routes, and Sans can only be battled on the Genocide Route.

The blue bone means you stay still and let the bone hit you. As long as you are completely still, the blue bone won't hurt you.

You can't fight Sans on the Pacifist Route. He can only be battled on the Genocide Route.

Yes! That actually would be a great idea so it can build up your practice. It is one of the hardest parts in the game, and practice makes perfect. So, yes, go for it!

It's because since he's the last part in the game (and one of the hardest besides Flowey). The creators wanted to make it difficult for those who play it. Clearly, it's a boss battle, so that's why it is hard to beat him. But, practice makes perfect! Try practicing with Bad Time Sim, or something that can build up your skills so it's easy to beat him.

Since he's one of the hardest characters to beat in the game, it takes a lot of time to just hit him once. They did not want to make the game too hard, so they made him 1 HP. It takes up to an hour to beat him for some, and up to 10 minutes for others.

It'll make the fight a little more difficult, but it should still be okay.

You don't need to, hitting him at all will progress the fight. The killing blow will be automatic.

Before you save the game after defeating him, just quit and reload it. You'll also get a special dialogue from him.

The two routes are definitely not the same. The Soulless Pacifist route can only be activated if you play a Genocide route and then a Pacifist route. The Post Genocide is just the end of a regular Genocide route.

You don't have to die to win, you just need to keep fighting until he talks about his "Special" attack, once you see that, your almost there, once he says he will use it after this attack, after that attack, he will then start his special attack, once he uses it, you just wait until he falls asleep and move the border to "Attack".

It's completely by chance, much like the gaster Easter eggs, so there's no way to get it unless you hack the game.

It is impossible to spare Sans. The thing you must have seen was a fan-made video or an alternative storyline in fan works.

He goes off-screen and disintegrates. After that, you must move on to fight Asgore.

The Stained Apron cannot be obtained during a Genocide Route (AKA the route where you fight Sans), and you are exactly right, defense does not matter at all. But one thing you can equip for protection is the Burnt Pan, for using consumables with it equipped heals an extra 4 HP.

Since only 1 hit by any weapon will take him out, the strength doesn't really matter, but I would suggest the Burnt Pan, because whenever you eat food with it equipped you gain an extra 4 HP. Armor doesn't matter at all, for all of his attacks do the exact same amount of damage. In fact, if you still have it on, just use the bandage for comedic effect.