itch.io - An online game marketplace and community.
Wine - Open Source Software for running Windows applications on other operating systems.
GOG.com - DRM-free game store, selling both new and old titles. No clients required.
CodeWeavers CrossOver - Don't buy a Windows license, don't reboot and don't use a Virtual Machine. Try a free trial of CrossOver to run your Windows software on Mac, Linux and Chrome OS.
Ubisoft Club - Ubisoft Club app enables you to get updates about your favorite games timely.
PlayOnLinux - PlayOnLinux will allow you to play your favorite games on Linux easily