The Binding of Isaac is developed by Edmund McMillen (one half of Team Meat, the duo responsible for Super Meat Boy) and Florian Himsl. Due to being programmed in Flash, it does not work on low spec GPUs such as those found on netbooks, unlike Super Meat Boy.
The full version of the game is only available on Steam. It was made available through other channels only in the Humble Indie Bundle Voxatron Debut.
A demo version is available on newgrounds.com in Flash.
On certain systems Steam achievements may fail to unlock and get registered.
A fan made fix 16px has been developed to solve this issue on Windows. It is not possible, however, to solve the problem on Mac without access to Windows.
For the achievements gained on a Mac 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.
Does not appear to be a fix for this yet. Also happens when pressing Windows key.
The Binding of Isaac states that Steam Cloud is used. However, no save data or settings are actually synced. The game runs on Flash, meaning that progress and settings are stored in non-standard locations.
Save game file is named so.sol and is located in Flash local storage folder.
C:\Users\%USERNAME%\Application Data\Macromedia\Flash Player\#SharedObjects
%appdata%\Macromedia\Flash Player\#SharedObjects\[some random string]\localhost\
C:\Program Files (x86)\Steam\steamapps\common\the binding of issac
Settings file is named serial.txt and is located in the Steam installation folder under \common\the binding of isaac\.
c:\Program Files\Steam\SteamApps\common\the binding of isaac\
~/Library/Application Support/Steam/SteamApps/common/the binding of isaac/
If transferring save games to a new computer, the game needs to be run on the new machine at least once. Once Flash has allocated the location of the new local Flash storage, then you can overwrite this with updated data.
This game does not natively support gaming peripherals such as gamepads.
The developers recommend somewhat light-heartedly that the players use, or google if they don't know it, a utility named JoyToKey. Please also check the controller category for more information.