We have a server which builds the latest version of Chaotic Rage from GitHub every week. This might be changed to a more regular cycle in the future. If you want the latest and greatest, this is the version for you.
These builds are experimental and possibly broken. No support is provided for them.
Note that the Windows version is built with the cross compiler MinGW (thanks the the excellent MXE project) unlike the release versions which are built with Visual Studio. There may be some differences and odd bugs in these builds. Also, these builds aren't currently in an installer but are using a zip file instead.
The Android builds are unsigned debug builds. You'll need to enable External Sources in the settings of your device to use them.