Credit to huntsman for his awesome arkade720 theme on which this is built upon. I've expanded support to 81 out of the 84 supported systems, created new system icons and added new system backgrounds snapped from launchbox Unified theme videos.
Submitted by Unified Arkade - email@example.com
Download - 61.5MB
North America: https://storage.googleapis.com/dig-themes-us/Unified.zip