Overview
This is a full guide to Undertale’s True Pacifist ending. This ending is considered the True Ending. This route leads to the True Credits.
Requirements
First of all, there are requirements for you to be able to do this run. Actually, there’s just 1. YOU MUST COMPLETE NEUTRAL FIRST. But Neutral is easy, don’t kill all, but don’t spare all. For True Pacifist, don’t kill anyone.
Ruins
Upon starting Undertale, all you have to do is proceed through the Ruins, sparing or fleeing from all monsters. When you encounter Napstablook, cheer him 3 times then spare him. Keep exploring rooms until you find 2 webs. Leave gold in the first one. You will get a donut. Save it for later. Once you are in Toriel’s house, talk to her once after visiting your room. Say yes to the nap. Go to your room, then sleep in the bed. Pick up the Butterscotch-cinnamon pie. Now talk to Toriel some more. Follow her downstairs. Keep following. When engaged in the fight with Toriel, keep pressing spare. Congrats, you’re out of the Ruins!
Snowdin
Upon leaving the Ruins, you will start walking through a forest. Keep walking, and soon you’ll reach a huge gate. Then, you encounter Sans. He will prank you using a whoopee cushion. Head through the gate and you will automatically hide behind the “conviniently shaped lamp.” Sans will make some puns, then you can proceed forward. At box road, check in the box and take the Tough Glove. Then you will have to go through a ton of easy puzzles. Don’t worry, some autosolve and have obvious hints. Then you will enter Snowdin Town. Go to the shop and buy some bisicles and a cinnamon bunny. Also buy the Manly Bandanna. Equip it. Proceed forward and die 3 times to Papyrus. Then, you can quit fighting him. Become his friend. Then, backtrack to the house next to the Librarby. (Yes, the Librarby.) Then go to his house. For some extra gold, check under the couch cushions. Then enter his room. Talk to Papyrus, then complete the date. Congrats, you finished Snowdin!
How to spare Greater Dog:
Beckon, pet, play, pet, pet
Waterfall
Upon leaving Snowdin, you will come to Waterfall. Just proceed forward like the other areas. Once you get far enough, Undyne will find you and start trying to kill you with spears. This happens twice. Once you get to the huge mountain / cave, dialogue. Then, go down and save. Move forward and the fight will start! Survive until you have the option to flee. Keep doing this and running through the cave. Papyrus will call you at the end telling you to meet him at Undyne’s. Then, you will enter Hotland. Cross the bridge, go to the water cooler and get a cup of water. Go to Undyne then pour it on her. Congrats! You’ve ALMOST finished Waterfall! Backtrack and go to Undyne’s house, (left of Napstablook’s), and attend the cooking lesson and faux battle. During the battle, fake hit her. Now, enter Hotland! Yay you’re done with Waterfall!
Hotland
Proceed through Hotland. The puzzles are all pretty easy. Once you get to the Muffet fight, eat the Spider Donut you got in the Ruins. Then you have the option to spare Muffet. Do it. Then you will enter the MTT Resort. Go through the alley and buy Junk Food from Catty and Bratty. Enter the Core, and get Mettaton EX’s ratings to 10,000. Then, backtrack out of the Core. On the bridge connecting the Resort to the Core, Undyne will call you. Go out of the Resort and ride the Riverman’s boat to Snowdin. Get Undyne’s Letter. She is waiting outside of Papyrus’s house. Now, the real fun begins.
True Lab
Go back to Hotland and slide the letter under the door of the Lab. Complete the date with Alphys. When you leave the garbage dump where befriending Alphys ends, Papyrus calls you and tells you to return to the Lab. Read the note, then go in the “bathroom.” The elevator will crash. Explore the True Lab and find 4 keys (One is dropped by Snowdrake’s Mother). Unlock all the doors. Enter the elevator.
How to Spare Amalgalmates:
Endogeny:
Beckon, pet, play, pet, pet
Lemon Bread:
Un-hug, flex, hum
Snowdrake’s Mother:
Joke, joke, joke
Reaper Bird:
Pick on, pray, mystify
Memory Head:
Cell, refuse
Determination
After the True Lab, go back to the Core, and go through the tunnel where you fight Mettaton. Go through New Home. Go to where you fight Asgore. But instead of fighting Asgore, you fight Asriel Dreemurr. You literally cannot die. Just keep dreaming and use Last Dreams to not have to reset a few turns. Soon, you will enter a 2nd phase. Then in a few turns, you will have the option to save your friends. It’s pretty straight-forward from there.
