Undertale Cheats, Codes, Hints and Walkthroughs for PC Games.

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 Undertale Cheats


Cheat Codes:
Submitted by: David K.

Proceed with caution and always make backups before modifying system files. You can 
access a hidden Debug Mode in Undertale, but you'll need to follow the directions 
precisely to avoid creating issues. Using a hex editor, open the "" file 
in your Undertale folder. Searching and going to the following offset: 000725B24
Look for the numeric value of 00, located in the 4th row of the offset's line. 
Change that value from 00 to 01 and save your changes. Now that you have access,
start playing the game.

You can use the following keys or key combinations for the corresponding effects:

Key         Effect
PAGE UP   - Increase Steps by 100
PAGE DOWN - Set attacks equal to 999
5         - Increase battle group
INS       - Next room
DEL       - Previous room
S         - Save
L         - Load
0/1/2/3/4 - Choose save file
F+6       - Travel to room_fire2 (138)
W+6       - Travel to room_water1 (82)
T+6       - Travel to room_tundra1 (44)
E+6       - Travel to room_castle_front (219)
R+6       - Travel to room_ruins2 (7)
Y+6       - Travel to room_truelab_elevator (244)
G         - Box
G         - Gain 5000 gold (while in a shop)
O         - Take out panel
I         - Put away panel
M         - Increase murder level
P         - Toggle room speeds
F         - Set room speed to fast
U         - Enable Undyne calls
F3        - Creates file system_information_962
F7        - Gain 500 gold
F9        - Stop sound
F10       - Phase through walls
F11       - Travel to room_water1 (82)
F12       - Restart room
V         - Collision boxes visible 
BACKSPACE - Fast walk speed
END       - Play current "monster tale" event, as dictated by plot
HOME      - Battle current group (default is 140)
DELETE    - Set HP to 999 (while in battle)
1         - Slow down (while in battle)
2         - Speed down (while in battle)
8         - Decrease turn timer (while in battle)
9         - Increase turn timer (while in battle)
F6        - Set mercy to 0 and attack to 999 (while in battle)
O+P       - Set mercy to 9999 (while in battle)

Hard Mode:
To activate hard mode, enter "Frisk" as your starting name. You'll get a warning
that this will "make your life hell"; confirm to begin playing hard mode. The 
changes include not being able to flee on the first turn of battles, toughened 
and new enemies, and only being able to hold three pieces of candy, among other 

Developers' Room:
In Snowdin, there is a large door that normally doesn't open for you, To open it, 
complete the credits without touching a single name, and beyond you'll find the 
developers' room.

Secret character:
Note: This procedure involves editing a game file; create a backup copy of the 
file before proceeding. Use a text editor to edit the "undertale.ini" file. Find 
the "fun" variable, then change its name to Fun (case-sensitive) and change its 
value to anything else. You will now find new locations and NPCs related to a 
new character named "W.D. Gaster".

Easter Egg Passwords:
Enter any of these names for your character and you'll receive some extra, hidden 
dialogue. Note that most of these names won't be able to be entered as your proper
name and thus will only unlock dialogue, unless otherwise noted.

Password                        Effect
Asriel                        - "..."
Catty [can use as own name]   - "Bratty! Bratty! That's MY name!"
Alphys                        - "D-don't do thatZ	
Undyne                        - "Get your OWN name!"
Temmie [can use as own name]  - "hOI!"
Flowey                        - "I already CHOSE that name"
Toriel                        - "I think you should chose your own name my child"
Bratty [can use as own name]  - "Like, OK I guess"
Sans                          - "nope"
Murder [can use as own name]  - "That's a little on- the-nose, isn't it...?"
Mercy [can use as own name]   - "That's a little on- the-nose, isn't it...?"
Chara [can use as own name]   - "The true name"
Asgore                        - "You cannot"
Gaster                        - (Reloads intro sequence)
Gerson [can use as own name]  - "HAHA,why not?"
Temmie [can use as own name]  - "hOI!"
Flowey                        - "I already CHOSE that name"
MTT[can use as own name]      - "OOOOH!!! ARE YOU PROMOTING MY BRAND?"
Murder [can use as own name]  - "That's a little on- the-nose, isn't it...?"
Mercy [can use as own name]   - "That's a little on- the-nose, isn't it...?"
Chara [can use as own name]   - "The true name"
Alphy [can use as own name]   - "Uh...ok?"
Bpants[can use as own name]   - "You really are scraping the bottom of the barrel"
Papyru [ can use as own name] - Ill allow it!
Jerry[can use as own name]    - Jerry

Boost Mettaton EX's Ratings:
During the final fight with Mettaton EX, if you have certain fashionable items, such
as the Stained Apron or the Cloudy Eyeglasses, your ratings by default are boosted. 
Furthermore, certain items being used, such as the Glamburger, will boost ratings. 
This will make it easier to end the fight sooner.

Easily Defeat Muffet:
To defeat Muffet in a single turn, you can use one of the Spider Bakery items - the 
Spider Donut and Spider Cider - you can buy significantly earlier in the game. Use 
one during the fight and it'll end immediately.

Weaken Asgore:
If you save the pie given to you by Toriel from the beginning of the game, and use it
during the final battle versus Asgore, you will weaken his attacks noticeably; being 
relatively hard to dodge, this makes the battle significantly easier.

How to Complete the Piano Puzzle:
Written by Password_XXX

This guide will teach you how to complete the undertale piano puzzle in waterfall.

Please note by doing this you will gain no achievements out of this guide for undertale 
has no achevements.

This is for if you want to figure it out by your self but need a little help.

Before you go back to the Umbrella room you are going to want to countinue on the 
right to the statue. Then go passed that and get the Umbrella and bring it back to the 
statue. Interact with the statue and give it the Umbrella. You will start to hear a 
little tune play. That tune you are supposed to match on the piano, go over to the 
piano and start palying. Make sure you press Z to actually play the keys. After messing
around for awhile you should be able to match the tune the music box in the statue is 

-=Easy Way Out=-
So you just want to complete the puzzle fast? Well I cant blame you I did the same. 
When you get to the piano play this (remember to press Z) ˇ ? ? ˇ? ˇ ? ? 
There you go have fun unlocking that secret door. 

How to Find Hidden Bosses:
Written by Megabartek4

Warning! Mayor spoilers. Note: Do the neutral run before reading this.

-=Glyde, Second Location=-
First - you must go there before fighting with Papyrus. Where? Remember place with X, 
O and ^ puzzle with slippery ice? Go there and go pass the ice bridge. Go down, next 
go left < and you will find Sans. Still go left. When you will find cave, go there and
go up. Now press v, <, > and ^ quickly and repeat this for some time. 
A boss will appear!

-=So Sorry, Fourth Location=-
Working only on pacifist run. 

This is little bit harder. First, you must make a neutral ending. Load your save file 
and go back to Hotland. Save in this place, when you must fight with Royal Guards. 
Turn off the game and change date to 10th october, 08:00 PM/20:00. Turn on the game 
and load save file Go right and you should hold ^ and > buttons. When you find secret 
glass bridge, go up and you will find the boss.

How to make snowman happy. Go to snowman location, take 1 piece, and do a neutral 

Sans's Keys:
Near the end of the neutral run, you'll encounter Sans. He'll judge you based on how 
many monsters you've killed. Finish the conversation, but don't save. Instead, reload 
the game from the last save and talk to him again. He'll give you a secret codeword 
that only a time traveler would know. Reload again for a double secret codeword, and 
then reload again. On this third reload, Sans will give you a key that unlocks his 
bedroom door in Snowdin. If you examine the dresser drawer inside his bedroom, you'll 
find the Silver Key. Exit the house and try walking in back of it. The Silver Key 
unlocks Sans's Workshop, which houses his time machine and a few story-related trinkets
that change depending on your actions throughout the game.

How to Complete Rouxls's Puzzles:
Written by pedrakhan

This is a guide for the Deltarune puzzles made by Rouxls Kaard.

-=Rouxls's Puzzles=-
So, you may have encountered Rouxls Kaard in Deltarune and don't know how to solve his 
puzzle. That's fine, because it's the most challenging puzzle in the game, if not in 
the history of mankind. I've spent a week wondering how to solve it, and finally, I've
completed it and now I'd like to share the solution.

So, how to do the puzzle?

1) Go to the right of the box.
2) Press Z.
3) Walk into the box.
4) Hold Z.
5) Walk into the box.

And there you have it - the puzzle's completed. There is also another puzzle in the area, 
but I'm currently stuck there and have no idea how to finish it.

How to Get Infinite Money:
Written by kizzys416

How to get infinite money on Undertale without save file changing which means it works 
on consoles as well.

-=What You Need=-
You need to have found the Temmie Village.
I recommend having the phone that Alphys gave you to use it as a box, but you could use the 
boxes near the places.

-=What to Do=-
Head over to Gerson's shop, and buy Cloudy Glasses.
Buy enough cloudy glasses to fill up your inventory and the box (boxes if you got Alphys phone).
Head over to the Temmie Village.
Start selling all the Cloudy Glasses you got from Gerson.
Repeat at will.

-=How It Works=-
If you buy Cloudy Glasses from Gerson, they cost 30G. If you sell them to the Tem Shop, you 
get 50G, plus whatever bonus (the bonuses happen once every nine times I believe), so you 
can get infinite money from this. I suggest using this to pay for tem college so you can 
get the Tem Aromor which is the best armor in game, or use this to buy stuff from muffets 
bake sale to avoid that fight (if you buy something from her in hotland, you wont get into 
the fight).

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