The Binding of Isaac

From PCGamingWiki, the wiki about fixing PC games

This page is for the original 2011 game. For the 2014 remake, see The Binding of Isaac: Rebirth.

The Binding of Isaac
The Binding of Isaac cover
Edmund McMillen
Florian Himsl
Release dates
Windows September 28, 2011
macOS (OS X) September 28, 2011
Linux November 1, 2011
Metacritic 84
Monetization Expansion pack
Modes Singleplayer
Pacing Real-time
Perspectives Bird's-eye view, Flip screen
Controls Direct control
Genres Roguelike, Shooter
Art styles Cartoon
Series The Binding of Isaac
The Binding of Isaac on HowLongToBeat
The Binding of Isaac on IGDB
The Binding of Isaac on MobyGames
The Binding of Isaac on Wikipedia
The Binding of Isaac
The Binding of Isaac 2011
The Binding of Isaac: Rebirth 2014
The Legend of Bum-Bo 2019


The macOS (OS X) version of this game does not work on macOS Catalina (version 10.15) or later due to the removal of support for 32-bit-only apps.

Key points

This game is programmed in Flash and does not work on low spec GPUs such as those found on netbooks.
Frame rate is capped at 30 FPS.[1]

General information

Community Wiki
Steam Community Discussions
The Binding of Isaac Soundtrack - composed by Danny Baranowsky.


Source DRM Notes Keys OS
Icon overlay.png
macOS (OS X)
DRM-free after installation (requires an internet connection during installation)
macOS (OS X)
Green Man Gaming Playfire Client Region-limited.
macOS (OS X)
Humble Store
Includes Wrath of the Lamb DLC.
Icon overlay.png
macOS (OS X)
Icon overlay.png
macOS (OS X)

DLC and expansion packs

Name Notes
Wrath of the Lamb
macOS (OS X)

Game data[edit]

Configuration file(s) location[edit]

System Location
Windows <path-to-game>\serial.txt[Note 1]
macOS (OS X) <path-to-game>/serial.txt
Linux ~/.macromedia/Flash_Player/#SharedObjects/WGGUXPNQ/localhost/so.sol
Steam Play (Linux) <Steam-folder>/steamapps/compatdata/113200/pfx/[Note 2]
This game does not follow the XDG Base Directory Specification on Linux.

Save game data location[edit]

System Location
Windows <path-to-game>\serial.txt[Note 1]
macOS (OS X) <path-to-game>/serial.txt
Linux ~/.macromedia/Flash_Player/#SharedObjects/WGGUXPNQ/localhost/so.sol
Steam Play (Linux) <Steam-folder>/steamapps/compatdata/113200/pfx/[Note 2]

Save game cloud syncing[edit]

System Native Notes
Steam Cloud
Save game carries over cross-platform. As of version 1.45, using Steam's Cloud storage will result in 94/97 secrets being unlocked even if you had completed every unlock, including Platinum God.


In-game options menu.
In-game options menu.


In-game control settings.
In-game control settings.

Keyboard and mouse State Notes
See the glossary page for potential workarounds.
Mouse acceleration
Mouse sensitivity
Mouse input in menus
Mouse Y-axis inversion
Controller support
No native support. JoyToKey can be used.


Audio feature State Notes
Separate volume controls
Surround sound
Closed captions
Mute on focus lost


Language UI Audio Sub Notes

Issues unresolved[edit]

Toggle fullscreen key doesn't work in-game[edit]

On the options menu, it states F is the key you use to toggle fullscreen/windowed mode. However, this only works on the title menu or in the pause menu. In-game, pressing F does absolutely nothing unless the game is paused. Currently, there is no fix for this.

Issues fixed[edit]

Steam achievements not unlocking[edit]

On certain systems Steam achievements may fail to unlock and get registered.

A fan made fix has been developed to solve this issue on Windows.[2]

Steam achievements on OS X[edit]

For the achievements gained on OS X to be unlocked in Steam, one has to copy and replace the so.sol files as outlined here. The file is located in:

~/Library/Preferences/Macromedia/Flash Player/#SharedObjects/''<Random String>''/localhost/

After extracting it, follow the instructions given in the aforementioned link. Finally launch the game and see the achievements unlock.

Alt+Tab Crashing[edit]

  • Does not appear to be a fix for this yet. Also happens when pressing Windows key.

Solution: press F, it toggles fullscreen.

Steam Community does not work in full screen[edit]

  • If you are playing the game in full screen, you will be unable to access Steam Community's Shift Tab overlay.

OS X Retina Display Slowdown on Mavericks+[edit]

Scaling on Retina displays appears to cause a slowdown between loading screens and during complex scenes.
Set Open in Low Resolution[3]
  1. Go to the installation folder.
  2. Right-click on the app.
  3. Select "Get Info".
  4. Check the box for "Open in Low Resolution".

Other information[edit]


Technical specs Supported Notes
Direct3D 9
OpenGL 2.0 OS X and Linux only.
Executable 32-bit 64-bit Notes
macOS (OS X)
This 32-bit-only macOS game does not work on macOS Catalina (10.15) or later.

System requirements[edit]

Operating system (OS) XP, Vista, 7
Processor (CPU) 2.5 GHz
System memory (RAM) 1 GB
Hard disk drive (HDD) 50 MB
Video card (GPU) DirectX 9.0c compatible
macOS (OS X)
Operating system (OS) Leopard 10.5.8, Snow Leopard 10.6.3, or later
Processor (CPU) Intel 2.5 GHz
System memory (RAM) 1 GB
Hard disk drive (HDD) 50 MB
Operating system (OS) Linux
Processor (CPU) 2.5 GHz
System memory (RAM) 1 GB
Hard disk drive (HDD) 50 MB


  1. 1.0 1.1 When running this game without elevated privileges (Run as administrator option), write operations against a location below %PROGRAMFILES%, %PROGRAMDATA%, or %WINDIR% might be redirected to %LOCALAPPDATA%\VirtualStore on Windows Vista and later (more details).
  2. 2.0 2.1 File/folder structure within this directory reflects the path(s) listed for Windows and/or Steam game data (use Wine regedit to access Windows registry paths). Games with Steam Cloud support may store data in ~/.steam/steam/userdata/<user-id>/113200/ in addition to or instead of this directory. The app ID (113200) may differ in some cases. Treat backslashes as forward slashes. See the glossary page for details.