The Binding of Isaac

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The Binding of Isaac
The Binding of Isaac cover
Edmund McMillen
Florian Himsl
Release dates
Windows September 28, 2011
OS X September 28, 2011
Linux November 1, 2011
The Binding of Isaac
The Binding of Isaac 2011
The Binding of Isaac: Rebirth 2014

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

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
Steam Users' Forums
The Binding of Isaac Soundtrack - composed by Danny Baranowsky.


Source DRM Notes Keys OS
GamersGate GamersGate Downloader (listed as "DRM Free" on store page)
Green Man Gaming Playfire Client
Humble Store Includes Wrath of the Lamb DLC.

Downloadable content (DLC) and expansions

Name Notes
Wrath of the Lamb

Game data[edit]

Configuration file(s) location[edit]

System Location
Windows <path-to-game>\serial.txt
macOS (OS X) <path-to-game>/serial.txt
It's unknown whether this game follows the XDG Base Directory Specification on Linux. Please fill in this information.

Save game data location[edit]

System Location
Windows <path-to-game>\serial.txt
macOS (OS X) <path-to-game>/serial.txt

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.

Video settings[edit]

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

Input settings[edit]

In-game control settings.
In-game control settings.
Keyboard and mouse Native Notes
Mouse acceleration
Mouse sensitivity
Mouse input in menus
Mouse Y-axis inversion
Controller support
No native support. JoyToKey can be used.

Audio settings[edit]

Audio options Native Notes
Separate volume controls
Surround sound
Closed captions
Mute on focus lost


Language UI Audio CC 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.

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[2]
  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.
64-bit executable
OS X and Linux only.

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
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 1.2 The Birth of Rebirth
  2. Slow framrate since upgrading to Mavericks *SOLVED* :: The Binding of Isaac General Discussions