Viewing Mod
The Binding of Undertale
TBOI x Undertale Crossover Mod
Created 8 years ago


Get the Repentance version here: https://steamcommunity.com/sharedfiles/filedetails/?id=866361359
or
https://steamcommunity.com/sharedfiles/filedetails/?id=2622895119



Get the AFTERBIRTH+ version here: https://steamcommunity.com/sharedfiles/filedetails/?id=2502664863



The download on this page is for Rebirth/Afterbirth only!




You feel something shining within you...


Thank you very, very much for the Mod's overwhelming reception and 50000+ Downloads!

This mod replaces characters, music, bosses and floors with Undertale content! Enjoy!
by Cake and Wight

Contact


Our Subreddit!


The Mod's blog





Q: Do I need Afterbirth for this to work?
A: No. Inside the folder, you can see there is a "Rebirth only" folder.

Q: Where's Toriel, Asgore and Chara?
A: You installed the Special version. Re-install the mod, but only Install the Basic version, not the Special one, and you'll get those characters.

Q: My game Crashes!
A: Install the mod, then delete Costumes2.xml. Be aware that this might cause characters to change appearence
when collecting some items.

Q: I'm in Snowy/Waterfall and the screen is pitch black!
How to fix:
Go inside resources/gfx/Background and delete the "Black" images. Those being: 8bitclouds_64,8bitclouds_64_black,8bitclouds_642,8bitclouds_643,blue_overlay and orange_overlay.

Q: I see a credits page, but not the Challenge page! Where is it?
A: If you want to see the challenges, just go inside gfx/ui/main menu and delete challengeph.png

Q: Is this compatible with Mac/Linux?
A: As far as we know, it's compatible with mac. It's super buggy with Linux, unfortunately.

Q: I found a bug! Where can I report it?
A: Either Private Message me through Steam or the mod's blog.

Q: Can I suggest/submit stuff?
A: Yes! Either go to the mod's blog or post a comment in this comment section.



- The mod can be very glitchy on Linux and Mac.

- Rebirth modding is janky, so expect glitches in the Rebirth-only version.

_ In Snowy Rivershore and Waterfall, the screen might go black, but you can still hear the sound. Read the FAQ, you can find the answer there.

-Bugfix for Mac:
http://moddingofisaac.com/mod/1027/bindingofundertale-elcapitanfix



SwingPoynt: https://www.youtube.com/watch?v=Zv1446FOAhY
SwingPoynt v2: https://www.youtube.com/watch?v=7ku56ChHm_I
Jacksepticeye: https://www.youtube.com/watch?v=vIp8YEmAimE
iVertrox (Spanish): https://www.youtube.com/watch?v=_AGvQtFw9MQ
Lumoblaze: https://www.youtube.com/watch?v=dIh2eZR8Sis

===========================================================

HOW TO INSTALL VIDEO by Zenofirex: https://www.youtube.com/watch?v=SvLa1zKY6rU

Special Thanks to:
Patkall - Sprites
FAz - Sprites
SoaringSparrows - Original Concept
IKARUS - Song Credit
/u/Haylex - Tem Shop Mod
Draexzhan - Miscellaneous Item Sprites
reijigazpacho - Logo
Felix (stupid-doo-doo-butt.tumblr.com) - Nightmare Sprites and the Omega Flowey boss
Sophomore - Miscellaneous Item Sprites
/u/otherhand42 - Miscellaneous Help
engineerthecowboy - Rebirth Testing
Toby Fox - Undertale

71531

downloads
x 8607

- Last support for the Rebirth and Afterbirth versions

- Refer to the link on the top of the page for the Afterbirth+ and Repentance versions!

- Updated character Nightmare and Boss sprites

- Added some items, visuals and bugfixes to the Rebirth and AB versions.

- 20+ New items and 3 transformations, by the talented FAz!

- Community Update: 20+ items and a Flowey transformation, by the amazing /u/Patkall! Thank you!

- Fixed compatibility with the newest Isaac patch.

- More items

- New version whenever Afterbirth+ Hits

- Fixed Rebirth Compatibility

- Rebirth Support! (Thanks to engineerthecowboy for testing!)

- Community Made items!

- More items, like Muffet's Pet and Lil' Whimsalot!

- New character: Mad Dummy!

- Made it easier to understand how to install/know what version you're using.

- Small item replacements.

- Balanced some stuff.

- Fixed Special Version having a hybrid of Gaster and Temmie.

- Two New Characters, Gaster and Temmie.

- Two new end bosses, Omega Flowey and God of Hyperdeath Asriel

- HP up item reskins

- Some music added

- Napstablook now Starts with Dapper Blook

- Frisk starts with Purity (Soul Colors)

- Between level (”Nightmare”) sprites, courtesy of @stupid-doo-doo-butt

- Only a small amount of items now change your character.

- Asgore, Sans, Mettaton, Toriel, Asriel and Undyne have new costumes wich will help prevent their appearence to change.

- Fixed some naming stuff

- Made the Character menu less messy

- Toriel starts with proper items

- Blue womb is not dunked up anymore

- Characters don't have their items because you didn't unlock them was fixed

- Napstablook glitches when picks up a item was fixed

- Frisk doesn't have Isaac's heart, just <3

- Papyrus lost 1 heart container inside his spaghetti

- Mettaton has better bombs and Tech.5 (not tech 2)

This mod is good but when you try and remove it, completely destroys your game
I needed to write more text to make a comment so here it is
I like undertale and I like The binding of Isaac so this mod is good for me
i have texture bug whit my coin and bomb after downloading this mod how to fix it pls?
I don't see Chara in the selection screen at all
i think there is a version for Chara
Got to Waterfall 1 and have a black screen? Not seeing the floor or my character at all.
como lo obtengo para el repentance si no lo tengo comprado?? :c

Hi, the link doesn't work well I think cause the site does not work.

ive been wanting to play this for about 6 years now

im using linux,and all the stages are completely blank (the scenario are totally white)what do i do?
adn the items reskins dont work too
Hiii just curious about the new isaac coming (repentance), are you gonna make a mod of undertale on it ? But very good work on the mod, i played like 400h with it !
I will probably update it, but only on the Steam workshop. However I won't add any new content.
I downloaded the mode and applied it, but only the Muppet, Monster Kid, and Songs appear, but other characters are not applied.
Hey good mod man, it´s really cool. But i have a question and i will be very glad that someane could answer me. This mod add or change items or it's only visual?

very good mod, but the sprites doesnt change when we get items, the sprites of the coins are broken, and I dont have the starting items (ex: chara's knife)
anyone have a idea for fixing this?
Welp looks like im going to have a bad time
guys, need help. i have tboi rebirth. so, i can't see anything on waterfall stage. i have HUD, but i cant see neither my character, nor whole stage. it's just nothing.
could anybody help me with solving?
is only the friends of creator writed it work?
i want this mod but i cant install it
i go into the common and there is nothing like the binding of isaac rebirth please help ;(
i love it ………………………...
is this compatible with the binding of issac mod loader?
Well, i did it right and it doesnt work. game do not see mod and do not change at all :/
Yep, i know about instruction, it is helpless.
Am i wrong with something???

p.s. i am from russia, there is my comrade in comments with same problem u no
when you like tboi and ut this is a great game crossover its pretty great
love itlove itlove itlove itlove itlove itlove itlove it
Kind of. It' functions but you cant play as The Forgotten no character swaps him and the mod fundamentally breaks him entirely.
is there any option to not dowanload this by java?

the rebirth only folder doesn't work
do i need afterbirth to play asriel? If not,i cant play these characters. My game crashes every time after loading the file with asriel,muffet and monster kid. (im playing on rebirth)
it doesn't work for me. i put all the asgore,toriel, and chara files in resources but its still normal binding of isaac
Is there a Rebirth version, or is it only for afterbirth/afterbirth+?
will this mod work with this?
out of three
I can't open the game. Every time I try to it tries to download itself again what am I meant to open it with
oh by the way im trying to download it for tboir\thebindingofisaacrebirth
I like Undertale and Binding of Isaac quite a lot, and seeing a mod that mixes the two is the best thing ever.
Really hope you guys continue this, it's really good!
Мод почему-то никак не виден
или я тупой и не правиль но делаю что то
windows breaks every mod on this website
it's not working for me is it because I'm on Mac?
It still works on mac. Im on mac so just try some different things and hope it works
I found the problem I didn't have Afterbirth+
In the files of the mod there should be a rebirth file i think. I used it before i had afterbirth and i don't have afterbirth +. So look inside the files
I can't open the game. Every time I try to it tries to download itself again.
It's already out for Rebirth and Afterbirth.
You just need to download the mod and you'd see inside that the Rebirth version is in it.
No prob.
If you'd like to friend me on steam, my username is ZeroL3gend5
i don't know how to get it to the binding of Isaac....
Go to Documents, My games, The binding if Isaac afterbirth + mods.
After installing this mod it game is crashesing (Mac OS)
Now I wonder if there will be a Deltarune mod?
Oh. My. God.
Same. In my opinion, Ralsei is quite a good character in the game.
favorite mod out of all of them!!!
In the Rebirth version apparently Frisk and Toriel's health are messed up making Toriel OP early game while making Frisk hard.
i love this mod so much, but it wont stop crashing. i havent been able to finish a run yet purely because every challenge room or boss rush or even sometimes just normal rooms, it crashes and restarts me at the beginning of the floor. please fix this
im on mac but why download i dont want to download
wow ! under tale was vary fun and so is the binding of aftherbirth + ! i am much glad that you will have made this game for us ( the commune ) to play ! keep doing what you are doing ! and ps #yolo !!!
please make it not a winzip file because my winzip expired
Try using Winrar. If you're already using Winrar then how could it expire? Winrar is free and basically can't expire, you'll always be able to use it.
Welp. Can't download it, im sad
*cri cri cri*
I like watching it, but won't install
This is pretty popular, but I'm not a fan.
I Just Played It Not Recording, Planning It!
10/10 IGN WOULD LOVE TO MAKE GAMEPLAY VID!!!!
Hi hello hello there, uh, was just thinkin', sans replaces cain, right? But wouldn't it be better if he replaced "The Lost"? 'cus Lost gets one-shoted (exactly like sans), and the holy mantle that u can unlock for him would be the "miss", no? Maybe it's a lill' too much to ask.. :b

Anyway, great mod
It's giving me the mod in a .rar file, that i have no clue how unpackage.
I Installed It But.Like When I Play Undyne Spears Dont Come Out Is That Just Me Or :PPPP

i can help even though i am not the creator:
Buy Afterbirth (but if you buied afterbirth and you are looking forward to buy AB+ install the AB+ version here: https://steamcommunity.com/sharedfiles/filedetails/?id=866361359&searchtext=undertale
how do i install it that it works????
[b][b][b][b][b][/b][/b][/b][/b][/b]
je pense qui faut le DLC AB et si ta AB+ utilise se lien
Where's the rebirth version?, do i only need to click download here, or there's a special link?
there are 2 things in rar. file afterbirth ver. and rebirth one no need to thank
Is there a way to install AB+ version without using steam?
nope, (if ur a pirate boi ur gr8 m80)
Why are people saying it dosent work it works the people are just not installing it right
Very good mod!!! Keep the good job!
I expected pandering trash to dig into the Undertale craze, and I got a really, really, REALLY good mod. Nice work, dudes!
really good job ! it's a wonderful mod
love this crap dude really good :mid finger:
Very good , i love undertale and the binding of isaac, so the merging of the two is PERFECT
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░░░▄█░▄░░░▀▀▀░░░▄░█▄░░░nope
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On the rebirth only version it's original music in ruins and no music in Snowdin.
한국어 지원랫츠 기릿
I tried downloading on Mac but some of the sprites don't work, most notably the entire background for every floor. Some of the characters still work and so does the music, but other than that its completely broken.
I love this mod ♥♥♥
it's so hard to get one of the older versions to work.
I come into this issue where when I download it, it opens an internet browser folder named the-binding-of-undertale_3.6.rar that I can't use. Could you help me?
Try opening the file with 7-zip or Win-Rar or something like that, then you should be able to copy and paste the files
how do I uninstall I want to play normal Isaac,chellanges get impossible with 1 hp
30/30/2030
when its that year, i will try to come back
Cool mod! i've been watching vids about it and just bought the game,lol, but i can't wait to play it, good job on it!
Help my games have a bug, I think is a texture bug beacause undyne have a shield but she don't have spear, I have a rebirt version, if kill a mom a firts times ?
help me plz le jeux binding of issac me fait un encrant noir et me dit que le jeux a cesser de fonctionner
des que je lance binding of undertale le jeu se mes noir et après me dit: binding of Isaac a cesser de fonctionner
1015
help!! I went to install it and its not working! how do I download and install it?
Well, perhaps you just didn't buy at least Rebirth.
hello, i have some trouble with this mod, only thing i get is backgound , new skin for character ( except dummy who still have dark isaac head) and flowey sound in top of devil room.
i didnt get undertale music, item, dummy full skin, timmy shop, and maybe other thing i dont know (i restart the game so i didnt unlock everything) does someone have a solution please ? thank you very much for any answer who can help me :0
By the way i play on rebirth version and i put rebirth mod on it.
So what's the difference between the "Rebirth-only" and the
"Afterbirth" version?
The Rebirth version only has Frisk, Asgore, Mettaton, sans, Toriel, Papyrus, Undyne, Mad Dummy and Gaster. It is also incredibly buggy. The Afterbirth version includes almost every Undertale main character, but Asriel, Monster Kid, and Muffet are in a separate character pack.
i downloaded the but i only got the asriel muffet and monster kid folder and the rebirth how do i get the other two?
antibirth is rebirth, so i think that the rebirth version might work
help i cant download it it asks me what do i want to usd to open it what do i do?
May I ask how you did changed the ISAAC thing on the title to UNDERTALE? I'm making my own modpack for the game, but I don't know how to change the title.
I don't know the Sprite directories by heart, but there is a folder named 'main menu' or 'title menu' somewhere in the UI folder which contains the Sprite for the title logo.
Is there a way to temporarily turn off the music part of this mod and put it back to the original Binding of Isaac music? I love the mod and its features, but I m honestly getting a little tired of undertale music and would like to change the music back to the default. The rest is wonderful, thank you!
COMMENT TELECHARGER LE MOD pour REBIRTH ?


tu va dans le dossier steam , steamapps, common, the binding of isaac rebirth, ressource, dans une autre fenetre tu ouvre le zip que tu obtien en telechargant sa, va dans le dossier rebirth only, copie tout se qu'ily a dans le dossier et colle le dans ressource
I do not know how to put it in my binding of isacc rebirth for mac

On mac go up to "Go" in the top left and click it. (On desktop if it does not show up click the background.) Now hit "Go To Folder". In the bar type ~/library/Application Support/steam/steamapps/common/ Click rebirth right click it then hit hit show package content. then click contents then resources then resources and put the things in the folder in.
¡Hello! I love your mod!
I got rebirth... Rebirth is buged or something, i wait for the next upgrade. 1015
REGARDS

how do u download the basic version
Chara is ??? you have to beat the game a couple of times to unlock her.
Love these mods, and love this site
Try and add Gaster! just a suggestion
For some reason it downloads as an internet file ...why??? I am really confused! Am I the only one with this problem?
I can't delete it from my mods. Can somebody please help me!
https://moddingofisaac.com/img/fly_explode.gif

wat

i was posting a comment

and then a fly
Undertales dead make some more fun stuff.
Like a game with the mod and other mods
Suit yourself, I think this mod is quite nice myself.
I tried downloading it, I opened the file and it told me it cant open ".rar" files. Please help?
You need to understand what the .rar format is first. When you make a .rar file, you can add multiple files into that rar file, kind of like a library of books, if each file is a book, a .rar file is a library containing multiple books. The .rar format isn't only there for putting multiple files or "books" into a single .rar or "library" but it also compresses the actual size of the book. Meaning if you have one file that's 10MB in size and you add it to a .rar archive, the .rar algorithm will attempt to compress the size, so then you'll end up with a .rar archive 6MB in size rather than 10MB since the .rar algorithm compressed the file to make it smaller. Since the mod contains a lot of files, it's a lot easier to put all the files into a single .rar file rather than offering a download for each file individually, that and it also compresses the size of the mod from 90MB to 80MB so it's faster to download. Anyways, to extract the files or "books" from a .rar file or "library" you need a separate program to extract it, it's not hard to do. There are two good programs that exist for this: WinRAR, and 7Zip. Download one of these and extract the .rar file using it.
i really did this mod I would like to suggest a item maybee for a future update? the item was mettaton's bomb as a follower that shots a bomb when you shot tears randomly
Can you add temmie as playable character?
What the Heck Is Happening With my Game?! Its So Buggy Right now i Can't See Right, When Drop a Penny Or Bomb Bugs A lot, Mad Dummy Its With Isaac's Face, Undyne Its Without a Eye And She Is Bald Now And Dont Have Her Spear,Doesn't have Alphys,Asgore Dont have a Beard Or Crown,Gaster Bugs When Die Or Take a Hit.
Thats It
i think alphys is only in afterbirth. don't quate me on that I don't remember
For some reason the head of the Mad Dummy is just Isaac's head and the skin tone is pitch black, FYI i'm using the Rebirth Version of this mod. Is there something i did wrong when i was installing? it or is it a glitch?
hi I think it would be cool if you added metaton the game

they did... as an item (forgot the name) and as the cathedral boss (Mettaton NEO) (to unlock cathedral you need to beat "mom's heart" 11 times) to unlock mom's heart beat "mom" (waterfall 2 or (if vanilla A.K.A no mods) abyss/ the depths 2)
w the only thing missing from mettaton for me is glitter bombs. I saw a vid where someone got a book that spawns bombs. and they always got batteries. they ended up fighting mega satan and filling THE ENTIRE ROOM with items and just pressing space. it was beautiful. also props for being so helpful in coments with the telling of ho to do things. I mean I wwknew already but that's still pretty nice of uw
what folder do you put the mod file in????? i am new at mods for isaac
I have the Afterbirth (Regular) version and I am planning to buy Afterbirth+ with the mod already installed. Can I do this?
the mod wont work for me AT ALL it downloads as a page and not a folder, it doesn't even let me open it! can someone please help? i love undertale and i realy want this mod
Best mod, 10/10 ign will play forever
I followed all of the directions, and my game won't even open, any fixes for this? I am on a windows 10 computer fyi
Amazing mod! Thank you for adding a rebirth version. I can't afford the DLC and I really wanted to play this mod
Having some problems with music not playing, using the rebirth version. Know it is a very early version but just wanted to say.
IDK what is the problem but it does not work
is there one for reburth thats the one i have

its in the download, theres a rebirth only folder.
I haven't tried this mod out. I'm downloading it. I'm so HYPE!
Where's Sans? All I see is Ness and the Undertale crew.
That was terrible, do you feel bad?? You should feel bad
who ever made this game its the best mod i have ever seen
how to make your voice sound like sans:
step 1 : say dunked 5 times
step 2 : say skeleton 2 times
step 3 : say lazybones 9 times
step 4 : hold your breath until you post this on another undertale game
you are right Xx_M4RCO_xX my voise did sound like sans
Yeah the steam AB+ version doesn't seem to work for me.
when i download i get a windows explorer shortcut
MisticNight you should copy the website url it brings you to and paste it to the search bar on the browser you use.
Best mod i saw in my life! You are awesome
This mod has made it so my game won't open.
Thanks a lot.
if you delete the game files and then reinstall them, your game should open back up just fine
I really love this mod it's still the best mod in my opinion to this day
I tried to download it, but no changes were made??
loooooooooooooooooooveeeeeeeeee iiiiiiiiiiiiiiiiiiiiiiittttttttt

best tboi and ut crossover ever
HOIIIII TEM SELL TEM FLAKE ON SALE!!!!!!!!!!!!!!!!!! BOIIIIIIIIIIIII!!!!!!!!!!!!!!!!!
i live for these two coming together!~
when i try to disable the mod it crashes my game
When you move out the mod you need to let the folders "packed" and "font" in ressources
how do you delete it i am on afterbirth+
great mod, I love how it changes almost everything in the game! thanks for the addition!

my favorite game combinded with the binding of isaac (also one of my farite games)
im not getting a zip when i download it

download a rar opener with a rar to zip and you can transfer it to the reacorses file

this is an amazing mod and i love it but i do have one small complaint.... all of a sudden my game keeps crashing when using some items. if i turn this mod off it works but well....i really love it. is there anyone else experiencing this? is there a fix without taking off the mod?
How do i download it for Rebirth? The same way?
just wondering how this mod is going and if it will be updated soon I really enjoy this mod and do not want to see it die off.
Why do all of the users in this comment section have such horrid grammar? what the actuall moomoomoomoomoomoomoomoooooooo. Am i right???
I have installed this mod, however the lil brim is not a gaster blaster. How do i fix this?
The mod is SO good. I watched hutts play it and I wanted it sooo bad! I finally got it today!
dont worry looked at install video and saw what i was doing wrong
What happent to this mod? I was playing it everything was normal,then i deleted mod. Some weeks later i installed new version and now some undertale skins are not working, main menu is not changing, some characters dont have their items. What should i do? (Sorry ofr my English)
P.S. I am from Russia
it is because the mod it's old, and it doesn't update
How do you get this mod? (For After birth plus).

Will you try to find a way to make this mod fork for a AB|+ WITHOUT BLOCKING achivements?
This mod isn't compatable with some other mods. just to let those wanting to know . (I learned this the hard way)
also how do we get all the Characters cause i saw a youtuber with most of them exept Asgore and Asriel how do i get that adn temmie?
Reskin the Duke of Flys to Onion San Just a idea Though
there is a rebirth version. look in the files.
April 10, 2022 - 2 years ago
Hey! We have a new Discord server. You can find more information in the announcements channel there. See you there!