Undertale Gameboy Color Edition
A faithful reimagining of the Demo of Undertale for the Game Boy Color. This demake recreates the original's core mechanics, pixel art style, and iconic soundtrack within the limitations of retro hardware. Includes turn-based combat, exploration, and a full color-compatible experience.
If you wanna get your hands on some juicy test builds or you generally just wanna get updates faster, consider joining the Patreon!
Latest Devlog:
made a few of the snowdin town buildings and npcs
fixed some bugs while i was at it too xd
i added a .cia in the downloads for ppl who wanna play it on a 3ds.
Download
Click download now to get access to the following files:
Development log
- Fully playable demo build!Nov 10, 2025
- Major Update Nr.2 !!!!Oct 01, 2025
- Undertale GBC Beta ReleaseSep 25, 2025
- Major Update!!!!Aug 10, 2025
- Additions!Jul 23, 2025
Comments
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I got a kernal panic and I dont have a image for it sorry
yo u should make a .gbsproj file for this it would be awesome to modify my own download of the game for funsies! If not thats totally fine though
Maybe when its done, not now tho
Sickk oki doki
There is a bug with vegetoid, when I tried encountering it I just got softlocked and after a bit it crashed. I'm guessing there's no vegetoid battle coded in but if there is it is a bug. (not really asking for it to be fixed but I just wanted to point it out)
this has already been fixed on patreon but it will be updated here when snowdins done
hello, this is a great remake but how do you press cancel?? (i accidentally pressed mercy and i couldnt cancel))
sadly you cant because if you would it would just brick itself so i decided eh for now youll just have to choose wisely xd
probably will fix it sometime tho but i dont wanna mess much with how the code for battles is structured because its super confusing
Cool demo
is this safe?
i presume so otherwise it wouldnt be on here xd
ok
Its a gameboy game, do you think that can hack you?
Is the bug of like the 3rd XO puzzle fixed in the webbrowser already? Cuz I started playing it like a month ago on the webbrowser (bc I only have my school laptop to play on) and bc of the bug I can't continue :( (can't download it either bc gbc emulators are blocked) But I never played Undertale before and this is already a very good game!! :D
Check the other comments ive included a screenshot that might help, otherwise on patreon the bugs been fixed and has a cheat just in case xd
Will be on here when Snowdins done tho
I don't have patreon (or money lol) and I dont get the screen somewhere in these comments at all tbh I'm sorry i ain't pretty smart in those things...
Its gonna be fine, ill just reply to your comment again to remind you when snowdins out, then you know itll be fixed! xd
Alright thankyouuu <3
awesome demake, i managed to enter debug room somehow (i still dont know how did this happened). also ralsei is playable character... didnt saw anyone talking about this![]()
i actually made a yt video teasing it cuz i found it funny xd
i interacted with the vegetoid in the hole-lever puzzle in the Ruins and the game froze and got stuck in a loop trying to start the battle. this could be just a browser thing though
yeah it should be fixed currently on patreon, im still waiting for snowdin to be done before uploading a new release here (which will not take too long)
fair enough. i will say, it's really accurate and i've been having fun with it so far
glad to hear :)
was this made with gb studio?
Yes
how can i get the gbc file?
By downloading it?
Hello, Aki! This is a beautiful remake of Undertale in the style of the Game Boy Color! However, there is one small problem I have. On the third XO puzzle, after I complete it and step on the gray stone to open the path, nothing happens and the small spike floor stays in place, meaning I can't progress the game! It would be greatly appreciated if there were a way to fix this small bug. Again, thank you so much for this wonderful remake of Undertale!
i actually js found out yesterday what the issue is ill just attach a picture to show what to do and not to
just try to not touch the bar crossed thru at all and start from the bottom corner, if it doesnt work just reset the room and try again
there is a fix in the patreon current patreon release, next public release will be when snowdins done!
Thank you!
Im typing this not beacuse i want you to do something with it but when i run it on my samsung gt-i5500 Android 2.1 eclair emulator gbcoid the background texture is just as stuck as it can get.
Btw good work - love it
The intro really made me emotional
( By being blind i got to the first savepoint and left the game )
the issue is some emulators dont like running it so far ive only gotten lucky with original hardware or vba and one more that i forgot the name of ;-;
Just try few different ones xd
is the genocide route possible. btw This was such a good thing to make bro, i haven't finished the actual undertale but this is fire. Is this able to be played on actual hardware
yes!! just need a flashcart or whatever works for you, i also added a 3ds virtual console version incase you got a hacked 3ds!
also theres a less bug infested version on patreon currently with more of snowdin!
I think the first xo puzzle is broken? I have looked at guides for the original game, and everything I try does not work. It is very fun otherwise, thank you for your work : )
you can check out my patreon it has a more recent test build that fixes a bunch of bugs! the next public release here on itch will be when the papyrus fight is done so you can finish snowdin
Thank you!
np :3
Wow! This game is great! Just a question: How did you make these soundeffects so good? Anyway, keep going on, becouse you are great at this!
Most of the sfx is done either as a crunched up .wav file (surprisingly works) some other are done with .vgm files
GBstudio uses both and HugeTracker for music which makes it all possible!
Great remake! How much progress in the game is there? Its too bad that it doesn't work on the dmg, but maybe you can do that later if you have the time. Its a lot better than a bunch of other peoples remakes, where when you just get outside of the ruins it ends. Keep up the good work! :)
you can check out my patreon it has a more recent test build that fixes a bunch of bugs! the next public release here on itch will be when the papyrus fight is done so you can finish snowdin
it reminds me of the real thing so much, nice job! And the game freezes/crashes when you try spare naplesbook(or however u spell it, idk) and when I'm about to die to Toriel.
I find it amazing that you are making and continuing this project. The fact you're past the ruins, where most would stop, is a showing of DETERMINATION.
I accidentally got the easter egg option
Tee hee
Best answer ever
:)
game breaks when you try sparing napstablook (I think thats their name I forgot)
game also breaks when encountering the carrot
this game actually tends to break a lot imo
Gimme the gbsproj pls
nope :3
Ok, but u have the images of the maps? I was making an gbc undertale fangame but i didnt had the maps (and trs just gives tiles)
Most of the maps had to be remade and downscaled, others were completely made from scratch
When it says "-PRESS START-" what do I press
Nvm
start-_-
This is amazing!!!
thx aki
Npnp
do you need the additions as well as the main game?
no you just need the .gbc file
i played it on original gameboy color and this is just fire demake, i'm waiting for parts after ruins
Ill upload a major update soon, cuz we are almost dun redoing the battle system, but for now if youd like to get updates consider joining the discord :3
that's great i'll be waiting!
how do i start for some reason its not letting me start a new game like how do i move around and yk do it
You press start on the main screen and A on new game, works for me, might have to restart the emulator or refresh the page
right now its asking me if i want to skip the intro and ive tried reloading the page but for some reason it doesnt work maybe my computer just doesnt work with this
I think that might be the case yeah, i js tried and it seems to work for me
i think its a problem with my old computer tbh it hasnt been working recently *sigh*
when snowdin
Soon
Were you able to get past the first xo puzzle then? If it is ok, could you tell me how? The guides I have found do not work, maybe this version is slightly different
does this work for dsi?
its for the gameboy so yes, you js need an emulator
great conversion even if a little janky at times
Nice games coming with updates is always ace ;)
That's really good dude! i really want to see the final result!
pretty good looking so far! the battle engine would be great with some polish. and the graphics need polish to. keep up the great work :3
Looking forward to updates :)
ohoho didnt expect to see this again :))
just updating you incase youre still looking forward to updates, the beta is done! :)
undatal
underwear