The Binding of Isaac: Mobile (Unofficial Android Port)
A downloadable game for Android
The Binding of Isaac: Mobile is an unofficial, fan-made Android port of the classic roguelike masterpiece.
Built entirely with a custom HTML5 + RufflePlayer integration and optimized native controls, this version brings the original Flash Isaac experience back to life — right in your hands.
💀 Features:
- Fullscreen gameplay with 8-way movement and 4-way shooting
- Smooth dual-joystick controls made for touch
- Native Android performance, fast loading
- Works completely offline
⚠️ Current Ruffle build does not support Isaac’s original save system.
This mobile port is run-only (no permanent stats / items save between sessions) for now
If a future Ruffle version fixes SharedObject compatibility for this game, I’ll update the port with full save support.
⚠️ Disclaimer
This project is an unofficial, non-commercial fan-made port of The Binding of Isaac.
It is not affiliated with, endorsed, or approved by the original developers, publishers, or any related entities.
All assets and characters belong to their respective owners.
This port is created purely for educational and entertainment purposes — no copyright infringement intended.
Download
Click download now to get access to the following files:
Development log
- ⭐Update v1.5Feb 10, 2026
- ⭐ Update v1.4Jan 03, 2026
- ⭐ Update v1.3Dec 10, 2025
- ⭐ Update v1.2 – Input Fixes + Eternal Edition Added!Dec 03, 2025
Comments
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Lots of issues. Ive got a flagship samsung and though id say it runs really good theres severe issues with hitboxes and Collison. I think this is a really cool project and you shouldn't give up on it
Привет! Я создал аккаунт специально, чтобы оставить свой комментарий. Игра действительно хорошая и увлекательная. Это отличная работа! Надеюсь, вы сможете преодолеть все трудности разработки и исправить все ошибки, потому что мы все этого ждём. Вы фактически создали целое сообщество вокруг этой игры.
Хочу сообщить о нескольких ошибках. После Пещер 1 игра начинает сильно тормозить. Загрузка новых комнат занимает много времени, а затем игра в итоге вылетает. Это довольно серьезная проблема. Я не думаю, что это связано с моим телефоном, потому что Подвал 1 и Подвал 2 работают отлично, без каких-либо задержек.
Coloca o idioma português
Only English
👍
Are you continuing development?
I have issue with Android Studio i can't build apk for some reason i tried all my best and watched a lot youtube tutorials how to fix problem and no help at all, i'm really sorry
Please fix the Brimstone bug; every time I try to use the item's attack, the game cancels the attack.
Hey I've been playing the port for a bit but for some reason the game just goes and randomly kicks me out of it I'll be into a run and then boom it kicks me out to the main screen would you be able to look into it
I will fix all problems when i fix Android Studio because i can't compile apk file for some reason.
I tried re-installing Android Studio but nothing helps
I've been trying to download the port but when i press play game it just apperas a black square. And i waited over like half hour and nothing happened. I think it is because my phone is 32 bit, but if there is a solution please help me.
first check is your phone 32bit because this works only on 64bit and after than if it's 64bit follow this bacuse Maybe u need to update System Webview, Follow this steps if u have old version
1. Install the Trichrome Library: Download and install the Trichrome Library first.
* Trichrome Library v141.0.7390.122
https://www.apkmirror.com/apk/google-inc/trichrome-library/trichrome-library-141...
2. Install System WebView: After installing the Trichrome Library, download and install the System WebView app.
* System Webview v141.0.7390.122
https://www.apkmirror.com/apk/google-inc/android-system-webview/android-system-webview-141-0-7390-122-release/android-system-webview-141-0-7390-122-5-android-apk-download/?redirected=thank_you_invalid_nonce
Important:
You must install the Trichrome Library before System WebView for both to install successfully
It's 32 bit but thanks anyways for trying to help me.
I can't believe someone finally decided to try and make a working flash Isaac mobile, just for that you deserve the money. I hope this project will improve, I'm mainly looking forward to data saving and hopefully something like a D-pad option (it feels odd using the current controls for me). Goodluck with the project.
Thanks man, i will try my best to make it clean and playable on all devices but for now i have issue with Android Studio soo i can't build APK file for some reason
Can you make it a D-pad for tears instead? I picked up brimstone, and now it is near impossible to fire.
u mean on controller or touch screen
Touch screen. The joystick thing makes it near impossible to fire with any tear variants that need to be charged, like with Brimstone, as said. The reason why I say a d-pad would be better is because the joystick is very sensitive and will only let you fire charged tears if you hold it still enough and with a d-pad it removes the guess work of the player to decide whether the games is going to shoot to the right or to the top, for example.
Since saving isnt an option, could you add an option that has everything unlocked from the start (a 100% save)
i'm making something new i will update u guys
I have a big question does it save like character unlockes
u can unlock while u play but when u exit than u lose progress, that's only until i find i way out how to fix it 😁
ty i needed to know
im unsure how this works but using an swf and ruffle-android from github seems to save my data. Maybe look into that?
yeaa maybe i will take ruffle android runtime and make my controls overlay with controls editor
It's not adding the textures for rocks in rooms and mini nap is messed up
Thanks for information 😁 i'm gonna update in game ruffle and add some features soon
also is there any extensions
What do you mean extensions? like DLC
Yea you were talking about mod dlc i thought it was extension also thanks for that
Hey this is fun but it freezes specially when room to room pls fix that also i dont really recommend these two but official settings would be nice and toturial cuz i just found out to see my stats after like 20 games
oh thanks for idea but this is PC game and i don't have source code of game to make a begginer tutorial but i will give my best to fix lag.
Can u provide ur phone specs 😁
its huawei 14 nova and does it affect it? Its a good phone and its lowkey overheateing after 40 min idk
it says mobile tho
it says mobile tho
I have an Samsung a 16
(Its just a question, not a request) it may be possible to port The Basement Collection too? i mean, i guess it uses the sfw files of the other games.
Well i can see and try to make it
Hello friend does this Game have the dlc or are planned to being added in the future? And why when i try to download the Game Google Automatically cancels the download does it contain some like a falce positive?
yeaa it's false positive, i never made hacks or virus
This real game and fully supported from Android 10+ also u have normal and Eternal just what u like
If you arent able to add save files, maybe you can make a version with everything unlocked?
u mean Mod Apk 😁 i wish but it's not all about mod apk it's about game source code man
Great port. I'm encountering some issues either its collision detection or objects aren't rendering properly. it usually happens in centered of the room its like invisible walls.
Maybe u need to update System Webview, Follow this steps if u have old version
1. Install the Trichrome Library: Download and install the Trichrome Library first.
* Trichrome Library v141.0.7390.122
https://www.apkmirror.com/apk/google-inc/trichrome-library/trichrome-library-141...
2. Install System WebView: After installing the Trichrome Library, download and install the System WebView app.
* System Webview v141.0.7390.122
https://www.apkmirror.com/apk/google-inc/android-system-webview/android-system-webview-141-0-7390-122-release/android-system-webview-141-0-7390-122-5-android-apk-download/?redirected=thank_you_invalid_nonce
Important:
You must install the Trichrome Library before System WebView for both to install successfully.
Whats the difference between eternal and normal
Eternal is a little bit harder and u have challenges and more enemys
Is there controller support?
yes
Will you also add saving?
I'm really trying really hard to add
W 😭
I made an account to comment on this. The port is really well made but please add customisable buttons(making them bigger/smaller) and also arrow controls.🙏🙏
I'm making on Layout Editor to u can Adjust
- Size
- Position
- Shoot: Joy/ Dpad
in upcoming update u will able to do it
Hi bro♥️, I’m interested in trying the game, but I saw that VirusTotal previously flagged the file as Trojan-Spy.AndroidOS.SMSSpy.
I understand that storage permission is needed for save files, but could you clarify whether the app requests SMS permissions? Also, could you share a link to the latest VirusTotal scan of the current version to confirm everything is clean?
I just want to make sure it’s safe before installing. Thanks.♥️
VirusTotal flag it as Virus but it's not at all and that's fake also SMS permission i didn't add that at all.
Game is 100% safe to play and u can also use PS4 / PS5 / XBox controller to play it
Virustotal flags this multiple times as a trojan, and why does this game need to read extrenal storage and write in it?
because game saves, i wanna add save to storage and read to u can use ur steam save,
Again Viruatotal i'm really sorry i know i fixed every single detection
Well the game works even offline so i trust you that its safe, btw how can i lower the resolution? I get ~10 fps during bosses on a redmi note 14 with 8 gb ram
there is no resolution in this game only u can set Performance Quality to Low because that's how game works
Thank you very much for this port, I will gladly try to make a donation in the coming month.
Hoping that we will soon have the possibility to save our game.
(And incidentally, more stability).
Thank u for your comment i will try my best to make it works on all devices from 10 and above
Do i have to downgrade my android version? I cant install the game :(
this game is Android 10+ because some functions is needed what older phones don't have and also u need 64bit phone
I Have Updated The system WebViewer and i have even force closed it and i am still having a black screen what i need to do ? 😭
Follow this steps
1. Install the Trichrome Library: Download and install the Trichrome Library first.
* Trichrome Library v141.0.7390.122
https://www.apkmirror.com/apk/google-inc/trichrome-library/trichrome-library-141...
2. Install System WebView: After installing the Trichrome Library, download and install the System WebView app.
* System Webview v141.0.7390.122
https://www.apkmirror.com/apk/google-inc/android-system-webview/android-system-webview-141-0-7390-122-release/android-system-webview-141-0-7390-122-5-android-apk-download/?redirected=thank_you_invalid_nonce
Important:
You must install the Trichrome Library before System WebView for both to install successfully.
Hello, and thank you very much for this wonderful port. Are you planning to add controller support and DLCs ?
Does it have all the DLCs?
this version don't have dlcs u can only choose do like eternal more or normal
How much characters are there? And what characters are those? Is the game actually good or just another trashy ripoff? Also are there gonna be any new characters
this is official Isaac made in flash player soo all characters u can see in game that's only one, and it's not remake or anything it's fully ported from pc to mobile, and i new update u will able to play with controller
Guy's just play the ps vita version with vita3k. It's rebirth and genuinely completely flawless even on mali excluding the drifty controls
Yeaa i tried that too but it's a lot memory usage and not every phone can play it on high framerate 😆 this is made as test example and shared and i'm really happy to see how much users want this game on phone
I've already updated everything and I'm still getting a black screen
Did u try to Force close app than launch again because server sometime is not stoped
now it works
After the disclaimer my screen turns black with the controls still on the screen?
Sorry to hear that, that's because ur System Webview is out of date
Make sure u have version v141 to play it
I've been trying to downgrade for ages, still can't.. Do u have any video recommendations or a guide to downgrade? only if u want to
1. Install the Trichrome Library: Download and install the Trichrome Library first.
* Trichrome Library v141.0.7390.122
https://www.apkmirror.com/apk/google-inc/trichrome-library/trichrome-library-141...
2. Install System WebView: After installing the Trichrome Library, download and install the System WebView app.
* System Webview v141.0.7390.122
https://www.apkmirror.com/apk/google-inc/android-system-webview/android-system-webview-141-0-7390-122-release/android-system-webview-141-0-7390-122-5-android-apk-download/?redirected=thank_you_invalid_nonce
Important:You must install the Trichrome Library before System WebView for both to install successfully.
This is only for Android 10+ and 64 bits
New update coming soon this is controls on PS5 Wireless Controller also u will able to use XBox too
- Full Controller Support
- Settings Screen
- Isaac Kontrols (not fully because game limits, when u pause u can resume with Circle but when u die u need to manualy touch on screen to go on Game menu
is it normal to go down to 20-15 fps in some bosses, even on best performance mode??? I have 8 gb of ram and a dimensity 8400 so i dont think its a problem of my phone. performance update pls, sick port tho.
I know the game is capped at 30 fps but is it normal to go below of that in my phone?
i will try to fix that too on my phone it's locked od 30fps all time no frame drop at all
My Spec is:
- Snapdragon 8 gen 3
- Ram: 12GB
Is it possible to make it compatible with controller? Would be much more enjoyable
That's coming soon in new update, for now u can't play with controller
En ninguna de las dos versiones funcionan los botones y específicamente en la de eternal no carga el juego
If screen is black ur System Webview is out of date u need to update it to v141 then button will be visible
yes but game only, on menu u will need to touch a play button to play
This will be only util i add new settings menu