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.


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
OS X <path-to-game>/serial.txt

Save game data location[edit]

System Location

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.

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