Undertale Secrets and Cheats Revealed: Unlock Hidden Items & Mysteries Now

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Beyond the primary narrative and destinations in Undertale, there’s a wealth of unexplored content waiting for you. This includes hidden cheats, codes, and passwords for secret features, items that can be bought, and even some sneaky glitches. These discoveries can lead players to an entirely new realm within Undertale they haven’t encountered before.

In the game, there’s an abundance of hidden tricks and shortcuts, making it challenging to locate them all individually. If your aim is to uncover them all, here’s a comprehensive guide encompassing every known cheat and secret within the game ‘Undertale‘.

All Secret Passwords In Undertale

In the game called Undertale, there are various hidden passwords you can enter at the start when you’re naming your character. Inputting these special names will trigger additional conversation immediately afterwards. Here is a list of all the available options for secret passwords.

Name Password Dialogue/Effect
Gaster Starts intro sequence again
Shyren “…?”
Blooky, Napsta “………. (They’re powerless to stop you.)”
Asriel “…”
Catty “Bratty! Bratty! That’s MY name!”
Woshua “Clean name.”
Alphys “D-don’t do that.”
Undyne “Get your OWN name!”
Temmie “hOI!”
Flowey “I already CHOSE that name.”
Toriel “I think you should choose your own name my child.”
Papyru “I’LL ALLOW IT!!!!”
Aaron “Is this name correct? ;)”
Jerry “Jerry.”
Bratty “Like, OK I guess.”
Sans “nope.”
AAAAAA “Not very creative…?”
MTT, Metta, or Mett “OOOOH!!! ARE YOU PROMOTING MY BRAND?”
Murder, Mercy “That’s a little on-the-nose, isn’t it…?”
Chara “The true name.”
Alphy “Uh…ok?”
Gerson “Wah ha ha! Why not?”
Bpants “You are really scraping the bottom of the barrel.”
Asgore “You cannot.”
Frisk Allows you to play the game in Hard Mode

All Cheats In Undertale

In the game Undertale, there are several shortcuts you can utilize to simplify challenging boss battles or effortlessly access specific areas. Here’s a rundown of the cheats included in the game.

Cheat Code Effect
Infinite Money After you receive Dog Residue, you will want to use the item, and then your inventory will completely fill up with Dog Residue. Then, go to the Tem Shop and sell the Dog Residue or Dog Salad, but make sure to leave one behind. This will allow you to keep making money by being able to sell the Dog Residue and Dog Salad.
Punch Card Glitch You will receive a punch card from the nice cream guy at the Waterfall. To skip cutscenes, make sure to menu buffer at the exact moment the cutscene begins. You can do this by opening the menu and clicking an arrow button at the same time to move the game forward by one pixel at a time. If you open and close the punch card here, the cutscene will be cut down, and you can move freely.
Glyde To make Glyde appear, visit the Mysterious Door room within Snowdin, and then you will need to move around for 2 minutes or more. You will need to make sure to do this before the fight with Papyrus, and make sure not to kill any monsters in Snowdin.

All Secret Items In Undertale

Within the game of Undertale, there are several hidden areas, boss battles, collectible items, and other surprises waiting to be discovered. For players who wish to include these secrets in their gaming experience, here is a roundup of all the exciting things to explore.

Secret Item/Location/Enemy How to Unlock
Developer’s Room To find the Developers’ Room, you will need to be in Snowdin and head to a large door that can’t normally be opened in a cave. However, once you complete the credits while dodging all the names, you’ll be able to open the door.
So Sorry This is a secret enemy that can be found in the Art Club Room in Hotland. Make sure to read the sign at the Art Club Room, and your computer’s clock is set to October 10th at 8 pm. You will also need to reach the MTT Resort before you try to take on So Sorry. Also, make sure you are on a Genocide Route, otherwise, the enemy will not appear.
Sans’ Room In order to open Sans’ Room, you will need to make sure to complete the True Pacifist Route. Then, when you enter the golden room in New Home, you will need to save before you talk to Sans. Then, exit the game after speaking with him. Finally, repeat the previous step 2 to 3 times, and Sans will eventually give you a key. Head to Snowdin, where you’ll find Sans’ room in the back, which is full of new lore.
Sans’ Hot Dogs You can purchase a few different items from the character Sans while in Hotland. This includes Head Dog, Hot Cat, Hot Dog, and Hush Puppy. You can directly purchase the Hot Dog from Sans, and then if you buy a second one, it will be a Hot Cat. To get the Head Dog, make sure to purchase a Hot Dog with your inventory full. For the Hush Puppy, purchase the Hot Dog…? from Sans, then go to MTT Resort, and put the Hot Dog…? in front of the last door in the resort. This action will give you a Hush Puppy after you lose the Hot Dog.
Gaster’s Followers You can run into some characters who will tell you about Gaster randomly in the game. If you change the code from ‘fun’ to ’66’, you will be able to meet these characters in Hotland or Waterfall.
Temmie Village Temmie Village is a hidden area in Waterfall. Start by lighting up all the mushrooms in the dark area in Waterfall, and then follow the path to the south to locate Temmie Village. You’ll find a bunch of Temmies living here, as well as a shop where you can sell items.

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2025-05-17 16:07