- The alternate ending (also known as the genocide pacifist route)is the route that will make you become a quarter monster. Then you will have to kill everyone.
How to do it
Before you date Toriel go kill a monster
to know if it worked go to napstablooks house.
If it says in red text "somebody IS there" "might of got the news" you have gotten the route
Go to snowdin and if monster kid is at is house he will say "yo human I have seen That you changed" "I.IHearn that you have betrayed people."(god why did I just say that in front of them) "if.if.you want to kill them you have to go through ME"
that will initiate a battle with monster kid again
He will NOT die instantly.
When you do your first attack on him he will Attack you with his weakest attack
After that if you FIGHT him he will die
Frisk has been watching and when you kill him they will run away.
Kill everyone else in snowdin
Kill everyone in hotland
Then in waterfall.Napstablook will be their and turn into NAPSTABLOOK THE NAPPER DAPPER.
Kill him then take his wet spear and throw it at the ruins door then kill everyone.
Then you will fight frisk
The you will encounter king papyrus but then he will Doe before you hit him.
Catty comes,absorbes the human souls,Takes Papyrus and yours and initate a soulless fight so you will die in one hit.
once you defeat catty she will die and every soul will drop and you absorb EVERY SINGLE ONE and use its power to destroy the whole world AND universe and then you meet (insert the OC that won here even though none won yet).They ask you to give them every soul and they can rule the BLANK and its survivors FOREVER. Then they give you a prompt to say YES or NO. Saying NO will make a fight that gives you 10000000 health but Y/OC Will deal 1000 health each hit.If you kill them you die.If they kill you,you die.Simple right?NOPE BECAUSE YU HAVE TO FIGHT Y/OC AGAIN WITH ONLY 1 HP TO RESTORE THE WORLD.AND IF YOU SAY YES THEN YOU WILL SKIP THE FIRST FIGHT AND TRY TO FIGHT Y/OC again to restore the world in the same battle.Edit:Dang it I need to change the title.