Download Delta Patcher
Download the Undertale patch file
Open Delta Patcher
Select the original Undertale file
Select the patch file
Choose the output location
Click Patch
Wait for the process to...
Keep choosing Mercy
Select Spare when Toriel’s turn comes
Do not attack her
Repeat Spare until the fight ends
Keep your HP above zero by dodging her attacks
Continue...
Reduce Mettaton EX’s ratings by attacking the legs, then the arms, then the body
During the fight, choose actions that raise ratings until the fight...
Learn the attack patterns
Memorize the bone layouts
Practice the timing for jumps and dodges
Stay centered when possible
Use the smallest movements needed
Save healing items for later...
In the fight, choose Act
Use Check if needed, then focus on surviving
When Undyne attacks, move to avoid her spears
On turns where fleeing is possible,...
Enter the fight with intent to survive, not to attack
Choose Act
Use Papyrus-related actions such as Flirt, Compliment, or other nonviolent dialogue options
Keep selecting nonviolent...
Complete the game without killing any monsters
Use only ACT, ITEM, MERCY, and FLEE in battles
Spare every monster you encounter
Do not gain any EXP or...
Complete the Neutral route first
Spare every major enemy and boss you can
Do not kill any monsters
Befriend Papyrus
Befriend Undyne
Complete Undyne’s hangout after giving her water
Deliver...
Start a new game
Play through the Ruins until the forced end of Hard Mode
Defeat Toriel
Continue until the game transitions out of Hard Mode automatically
Proceed...
Fight random encounters and choose the lowest-EXP, highest-Gold options available
Spare enemies after lowering their HP to earn Gold without gaining EXP
Repeatedly encounter and spare...
