Genocide - Ruins - Undertale Guide - IGN (2024)

This page is part of a Genocide walkthrough for Undertale. It is recommended you complete a pacifist run first using our Pacifist Walkthrough if you want to experience all the endings.

The Ruins are the first area you will encounter in Undertale after you have woken up from your fall to the Underground.

You will need to kill 20 creatures as well as Toriel to meet the criteria for a genocide run in this section.

Once you leave this room via the path and door to the right you will see a single flower in a spot of light. Talk to him and he will explain how combat works in this game.

Flowey

After a brief introduction, your screen will switch to what you'll come to know as the combat screen. This features whoever you're fighting in the middle above a white box with a red love heart inside. Below this, you can see your level and HP.

Flowey will drop what he calls "friendliness pellets" and tells you to move your heart into them. Do so and you'll discover they actually cause you damage and this little flower is trying to kill you.

This introduces you to the 'bullet hell' portions of the game where in a normal situation you would need to dodge the white parts inside the box - but for now, you have no choice but to succumb.

Before he manages to land the final blow, you'll be saved by a monster named Toriel.

Toriel

Toriel will explain she is the caretaker of these ruins and often comes by to check if humans have fallen. You are apparently the first human in a long time and she offers you to guide you through the ruins.

You don't really have a choice, so follow Toriel to learn the basics of how Undertale works.

The next room is a large purple space with a shining light before the stairs. These light points are save points, so save now before following Toriel up the stairs and through the exit.

Now she will show you the basic mechanisms behind upcoming puzzles.

There are signs on the walls which give you hints but for now she has marked the switches you'll need to activate, so follow her and activate the switches she has marked with yellow to clear your path.

The next room has a dummy in it, which she wants you to use for combat practice. Toriel wants you to practice striking up a conversation with the dummy to by time until she can intercept, like she will to protect you against monsters while you are in her care.

Talkng to the dummy will trigger another fight like with Flowey, but this time you have more options.

As this is a genocide run, you should probably choose to hit the dummy which won't impress Toriel. To hit the dummy choose 'Fight' then hit your action button when the white bar is closest to the center for maximum damage.

While following Toriel now you'll experience random encounters. Choose to Fight them, regardless of Toriel's scowls.

The next room contains another puzzle but once there, Toriel will decide it's probably a bit much for you and complete it herself, safely leading you across the spikes.

Then she will present you with the challenge of walking across the hallway by yourself. Don't worry despite the intense music, simply walk to the right to the end - nothing will happen and she will reappear and apologise and inform you she needs to go for a while.

Toriel will instruct you to wait but ignore her and continue right to the next room.

Explore

As soon as you move on from this room, you'll get a phone call from Toriel trying to guilt you into staying put. Ignore that and talk to the Froggit for some handy tips as well as use the save point.

From here you will encounter more random enemies and you won't be able to have Toriel come frown at them to save you. As this is a Pacifist Walkthrough you will need to make sure you don't kill any of the enemies - only defeat them by 'act' or run away.

Make your way into the northern room where you'll find a candy jar on a podium. It will say 'take one, please' but you can take up to four, then exit the same way you came in.

Head down and then right into the next area. You'll walk across a dark patch of ground which will drop you into another room - continue through the door to the right to reappear on the other side of the dark patch in the previous room.

Toriel will phone you again in the next section and ask you for your preference between Cinnamon or Butterscotch, choose whichever you like. She'll call again to make sure you don't dislike the other option.

A grey rock is in the middle of this room, push it to the grey square to dispell the spikes and continue.

Now you'll come across a room full of the dark patches that let you fall through the floor. If you do so you'll come to a room full of leaves. Everywhere the leaves aren't is the path you need to take in the room above - go back through the door to come out at the previous room and take this path to move forward.

The next room has three slideable rocks, one rock will need you to talk to it multiple times before it will go onto the grey panel and allow you passage past the spikes.

This room is another save point, so make sure to use it before continuing.

Napstablook

Now you'll come across a sleeping ghost. This is sort of a boss battle as it's unavoidable but it isn't too difficult. Talk to the ghost and choose to move it with force to start the battle with Napstablook.

You'll need to hit Napstablook about 4 times. You can't kill him because he's a ghost but he will end the battle at this point.

Napstablook's attacks are in the form of tears. For his first tears which are wiggly and drop straight down, stay to the lower section to give yourself plenty of time to dodge them. The more rounded tears are best avoided by staying near the centre of the square.

Once the battle is over, Napstablook will get out of your way so you can move on.

Continue Exploring

The room to the right has a Spider Bake sale.

The small web will give you the option to leave 7G in return for a Spider Donut which heals 12 HP - Purchase them if you need more HP.

Now go back out and exit north where three Froggit will give you some tips and Toriel will call you to explain that there are items you can pick up and carry, but your inventory is limited.

From here you can also encounter some new enemies.

In the next room are six dark patches to fall through:

• The top left will let you fight a Vegetoid.
• The lower left patch will let you find a Faded Ribbon which gives you +3 to Defense.
• Top middle has the switch you need to continue.
• Bottom middle you can talk to Napstablook again.
• Top right has nothing.
• Bottom right has another Vegetoid.

Now we come to a bunch of pillars with switches. Try to make note of where the switches are located because the following sections are the same room on different angles which means the switches are hidden behind pillars.

You want to move through and find the blue switch which is behind the first pillar.

Now you can move past the spikes to the next room - in here you want the red switch which is visible next to the last pillar.

The final room wants you to hit the green switch behind the middle pillar.

Proceed to the next section which branches. Walk all the way to the right to come to a door with a Froggit. Inside this room, you can find a Toy Knife which is a weapon that does 3 damage.

Before moving on continue to fight random encounter enemies and kill them. You will need to have murdered 20 creatures. After you've met the quota the next random encounter will look like this, with the text "But nobody came."

Head back to the branching room and exit north where you'll reunite with Toriel who will take you to her home. Use the save point out the front before following her inside.

Toriel's House

Go inside and Toriel will talk about you living here and show you to your room. Interact with the bed to sleep, when you wake up there'll be a slice of pie waiting for you, which will restore all your health - take it and head out of the room.

You can explore her house freely but there's nothing, in particular, you need to look at. Once you're ready, head left from your room to the living room and talk to Toriel.

She will ignore your pleas, but you need to keep choosing the option telling her you want to leave the ruins. Eventually, this will cause her to leave.

Go back out the front to save your game, then head down the stairs the main entrance to follow Toriel.

In the basem*nt corridor you'll meet Toriel who'll say she's going to destroy the exit so that you stay safe. Keep following her and she will choose to battle you to prove you are not ready to leave.

Toriel Boss Fight

This boss fight will be over very quickly if you have successfully killed all the creatures prior.

Toriel has four different attacks.

• Fire will fall from the top of the box - stay around the middle of the box to dodge.
• A fire helix will twirl downwards - again, stick to the centre.
• Hand Sweep - move to the bottom center of the box, then go around the edges once the flames follow you.
• Double Hand Sweep - start at the center and move to the side.

The good news is Toriel doesn't want to hurt you. If your health is low her attacks will become less accurate.

Kill: Hitting Toriel once will kill her.

Go through the doors, up the long corridor and you'll meet Flowey again. He will confirm whether or not you have killed anyone and taunt you. Exit the large doors and you'll move onto the next area.