What are some alternatives?
When comparing DJL and Photon Game Manager, you can also consider the following products
G2A - Enjoy the vast offer of Steam, Origin, Uplay, Battle.net, GOG, PSN and XBOX CD-Keys at the most attractive prices on the market. Don’t overpay – buy cheap on G2A.COM!
Playnite - Source code generated using layoutit.com
GOG.com - DRM-free game store, selling both new and old titles. No clients required.
Lutris - Lutris is an open source gaming platform for GNU/Linux.
Nvidia Grid - Amazing gaming. Anywhere.
LaunchBox - LaunchBox is a portable, box-art-based games database and launcher for DOSBox, emulators, arcade cabinets, and PC Games. Download it free!