You can download the Gallery's games and play them on your own computer.
Source code
Choose this if you want to build the games yourself, or investigate how they work.
Linux
Packages may appear someday.
Mac OS X
This build is a few years old. It doesn't include Advanced Rogue 7, XRogue, or recent bug fixes. I don't currently have access to any Apple devices, so I have little hope of being able to provide updates for this platform.
Windows
Test build for 64-bit Windows 8. This is still a work in progress.
Bugs?
If you find any problems, report them on Bitbucket.