These are the files you need if you have not previously downloaded Coldest.
Windows Note: You may need to run vc_redist.exe to install the Visual Studio 2005 runtime if you don't already have it.
Mac OS X: Read about the potential for Mac support here.
These are smaller files that you can download if you already have a full download and want to reuse it on a different platform. Simply extract the full download and the appropriate file below in the same location.
Patches are now handled by the in-game updater
Information on obtaining and compiling the source code can now be found on the Development Wiki.