Cheats & Guides

Undertale Cheats For PC

  1. 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.

    Contributed by: KeyBlade999 

  2. 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 things.

    Contributed by: KeyBlade999 

  3. 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.

    Contributed by: KeyBlade999 

  4. 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.

    Contributed by: KeyBlade999 

  5. 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.

    Contributed by: KeyBlade999 

  6. 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.

    Contributed by: discoinferno84 

  7. So Sorry

    There's a hidden enemy called So Sorry. To find him, you must read the sign at the Art Club Room in Hotland while your computer's clock is set for October 10th at 8 PM. You must also reach the MTT Resort before attempting the encounter. Lastly, So Sorry cannot be encountered on the Genocide Route, because that area of Hotland is blocked off.

    Contributed by: discoinferno84 

  8. 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.

    Effect
    Gaster (Reloads intro sequence)
    Shyren [can use as own name] "...?"
    Napsta [can use as own name] "............ (They're powerless to stop you.)"
    Blooky [can use as own name] "............ (They're powerless to stop you.)"
    Asriel "..."
    Catty [can use as own name] "Bratty! Bratty! That's MY name!"
    Woshua [can use as own name] "Clean name."
    Alphys "D-don't do that."
    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"
    Papyru [ can use as own name] "I'LL ALLOW IT!!!!"
    Aaron [can use as own name] "Is this name correct? ;)"
    Jerry [can use as own name] "Jerry."
    Bratty [can use as own name] "Like, OK I guess."
    Sans "nope."
    AAAAAA [can use as own name] "Not very creative...?"
    MTT [can use as own name] "OOOOH!!! ARE YOU PROMOTING MY BRAND?"
    Metta [can use as own name] "OOOOH!!! ARE YOU PROMOTING MY BRAND?"
    Mett [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?"
    Gerson [can use as own name] "Wah ha ha! Why not?"
    Bpants [can use as own name] "You are really scraping the bottom of the barrel."
    Asgore "You cannot."

    Contributed by: KeyBlade999, ironyisntdead, Sansfan06, CheezyDawg 

Walkthroughs & FAQs

Type Name File Size
General FAQs FAQ by cyclone2 23K
General FAQs FAQ/Walkthrough by Scarlettail 154K
In-Depth FAQs Monster Sparing Guide by AlwaysInADream 8K
In-Depth FAQs Secrets FAQ by sans 29K
In-Depth FAQs Text Dump by sans 592K

Undertale Cheats For Macintosh

  1. 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 things.

    Contributed by: KeyBlade999 

  2. 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.

    Contributed by: KeyBlade999 

  3. 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.

    Contributed by: KeyBlade999 

  4. 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.

    Contributed by: KeyBlade999 

  5. 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.

    Contributed by: KeyBlade999 

  6. 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.

    Effect
    Gaster (Reloads intro sequence)
    Shyren [can use as own name] "...?"
    Napsta [can use as own name] "............ (They're powerless to stop you.)"
    Blooky [can use as own name] "............ (They're powerless to stop you.)"
    Asriel "..."
    Catty [can use as own name] "Bratty! Bratty! That's MY name!"
    Woshua [can use as own name] "Clean name."
    Alphys "D-don't do that."
    Undyne "Get your OWN name!"
    Temmie [can use as own name] "hOI!"
    Flowey "I already CHOSE that name"
    Toriel "I think you should think of your own name, my child."
    Papyru [can use as own name] "I'LL ALLOW IT!!!!"
    Aaron [can use as own name] "Is this name correct? ;)"
    Jerry [can use as own name] "Jerry."
    Bratty [can use as own name] "Like, OK I guess."
    Sans "nope."
    AAAAAA [can use as own name] "Not very creative...?"
    Metta [can use as own name] "OOOOH!!! ARE YOU PROMOTING MY BRAND?"
    Mett [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."
    Gerson [can use as own name] "Wah ha ha! Why not?"
    Bpants [can use as own name] "You are really scraping the bottom of the barrel."
    Asgore "You cannot."

    Contributed by: KeyBlade999, ironyisntdead 

Walkthroughs & FAQs

Type Name File Size
General FAQs FAQ by cyclone2 23K
General FAQs FAQ/Walkthrough by Scarlettail 154K
In-Depth FAQs Monster Sparing Guide by AlwaysInADream 8K
In-Depth FAQs Secrets FAQ by sans 29K
In-Depth FAQs Text Dump by sans 592K

Undertale Cheats For Linux

  1. 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 things.

    Contributed by: KeyBlade999 

  2. 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.

    Contributed by: KeyBlade999 

  3. 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.

    Contributed by: KeyBlade999 

  4. 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.

    Contributed by: KeyBlade999 

  5. 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.

    Contributed by: KeyBlade999 

  6. 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.

    Effect
    Gaster (Reloads intro sequence)
    Asriel "..."
    Catty [can use as own name] "Bratty! Bratty! That's MY name!"
    Alphys "D-don't do that"
    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"

    Contributed by: KeyBlade999 

Undertale Cheats For PlayStation 4

  1. 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.

    Contributed by: KeyBlade999 

  2. 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.

    Contributed by: KeyBlade999 

  3. 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.

    Contributed by: KeyBlade999 

  4. 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 things.

    Contributed by: KeyBlade999 

  5. 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.

    Contributed by: KeyBlade999 

  6. 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.

    Effect
    Gaster (Reloads intro sequence)
    Asriel "..."
    Catty [can use as own name] "Bratty! Bratty! That's MY name!"
    Alphys "D-don't do that"
    Undyne "Get your OWN name!"
    Gerson [can use as own name] "HAHA,why not?"
    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"
    Alphy [can use as own name] "Uh...ok?"
    Asgore "You cannot"
    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

    Contributed by: KeyBlade999, Sansfan06 

  7. Trophies

    Complete each requirement to get the specified trophy.

    Trophy
    Donate 2G to the Dog Shrine. Dognation Level 1
    Donate 125G to the Dog Shrine. Dognation Level 10
    Donate 155G to the Dog Shrine. Dognation Level 11
    Donate 190G to the Dog Shrine. Dognation Level 12
    Donate 230G to the Dog Shrine. Dognation Level 13
    Donate 280G to the Dog Shrine. Dognation Level 14
    Donate 350G to the Dog Shrine. Dognation Level 15
    Donate 6G to the Dog Shrine. Dognation Level 2
    Donate 12G to the Dog Shrine. Dognation Level 3
    Donate 20G to the Dog Shrine. Dognation Level 4
    Donate 30G to the Dog Shrine. Dognation Level 5
    Donate 43G to the Dog Shrine. Dognation Level 6
    Donate 59G to the Dog Shrine. Dognation Level 7
    Donate 78G to the Dog Shrine. Dognation Level 8
    Donate 100G to the Dog Shrine. Dognation Level 9
    Get an item. Don't Worry, I Have Lots of Ideas for Trophies
    Obtain all other Undertale trophies. Don't You Have Anything Better to Do?
    Arrive at Snowdin. Exodus
    Enter Hotland. Final Stretch
    Reach Hotland 2F. Final Stretch II
    Reach Hotland 3F. Final Stretch II
    Reach the second save point in the CORE. Good Luck
    Get four items. Help Me, I'm Out of Ideas
    Get two items. Like Getting Items
    Get to the Spaghetti save point in Snowdin. Manna
    Arrive at Waterfall. Midpoint
    Reach the mouse hole in the Ruins. Mouse
    Get three items. Or Getting More Items
    Reach the place where it rains. Rain
    Enter the Ruins. Ruins

    Contributed by: Mookiethebold 

Undertale Cheats For PlayStation Vita

  1. 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.

    Contributed by: KeyBlade999 

  2. 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.

    Contributed by: KeyBlade999 

  3. 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.

    Contributed by: KeyBlade999 

  4. 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 things.

    Contributed by: KeyBlade999 

  5. 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.

    Contributed by: KeyBlade999 

  6. 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.

    Effect
    Gaster (Reloads intro sequence)
    Asriel "..."
    Catty [can use as own name] "Bratty! Bratty! That's MY name!"
    Alphys "D-don't do that"
    Undyne "Get your OWN name!"
    Gerson [can use as own name] "HAHA,why not?"
    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"
    Alphy [can use as own name] "Uh...ok?"
    Asgore "You cannot"
    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

    Contributed by: KeyBlade999, Sansfan06 

  7. Trophies

    Complete each requirement to get the specified trophy.

    Trophy
    Donate 2G to the Dog Shrine. Dognation Level 1
    Donate 125G to the Dog Shrine. Dognation Level 10
    Donate 155G to the Dog Shrine. Dognation Level 11
    Donate 190G to the Dog Shrine. Dognation Level 12
    Donate 230G to the Dog Shrine. Dognation Level 13
    Donate 280G to the Dog Shrine. Dognation Level 14
    Donate 350G to the Dog Shrine. Dognation Level 15
    Donate 6G to the Dog Shrine. Dognation Level 2
    Donate 12G to the Dog Shrine. Dognation Level 3
    Donate 20G to the Dog Shrine. Dognation Level 4
    Donate 30G to the Dog Shrine. Dognation Level 5
    Donate 43G to the Dog Shrine. Dognation Level 6
    Donate 59G to the Dog Shrine. Dognation Level 7
    Donate 78G to the Dog Shrine. Dognation Level 8
    Donate 100G to the Dog Shrine. Dognation Level 9
    Get an item. Don't Worry, I Have Lots of Ideas for Trophies
    Obtain all other Undertale trophies. Don't You Have Anything Better to Do?
    Arrive at Snowdin. Exodus
    Enter Hotland. Final Stretch
    Reach Hotland 2F. Final Stretch II
    Reach Hotland 3F. Final Stretch II
    Reach the second save point in the CORE. Good Luck
    Get four items. Help Me, I'm Out of Ideas
    Get two items. Like Getting Items
    Get to the Spaghetti save point in Snowdin. Manna
    Arrive at Waterfall. Midpoint
    Reach the mouse hole in the Ruins. Mouse
    Get three items. Or Getting More Items
    Reach the place where it rains. Rain
    Enter the Ruins. Ruins

    Contributed by: Mookiethebold