What Windows PC games run with Proton on Linux?

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Best answer: According to ProtonDB, a website that tracks game support with Valve's Proton compatibility layer, almost 16,000 Windows games are playable.
What is Proton?

Windows-based software and games aren't natively compatible with Linux (and other operating systems) unless the developer includes the required files. This is where packages like WINE (WINE Is Not an Emulator) convert code so that Linux is able to run apps and games without requiring some form of emulation.

Full story from the WindowsCentral blog...