Games playable on Mac with Parallels
These games run on Mac by installing Windows in a virtual machine with Parallels Desktop. Parallels runs the ARM build of Windows on Apple Silicon; you install the game inside Windows and play. It uses more resources than CrossOver, but it's the most "just works" route for games that need a full Windows environment.
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Portal 2 runs on Mac by installing Windows in Parallels.

BioShock Infinite has an official Mac build that runs on Apple Silicon through Rosetta 2.

World of Warcraft runs natively on Apple Silicon, with no extra software needed.

Team Fortress 2 runs on Mac by installing Windows in Parallels.

Crusader Kings III runs natively on Apple Silicon, with no extra software needed.

Braid has an official Mac build that runs on Apple Silicon through Rosetta 2.

Borderlands 2 has an official Mac build that runs on Apple Silicon through Rosetta 2.

Dead Cells has an official Mac build that runs on Apple Silicon through Rosetta 2.

Left 4 Dead 2 no longer has a Mac build on Steam, but the Windows version plays on Mac through CrossOver (rated Gold on ProtonDB).

The Binding of Isaac: Rebirth has an official Mac build that runs on Apple Silicon through Rosetta 2.

The Binding of Isaac: Afterbirth has an official Mac build that runs on Apple Silicon through Rosetta 2.

Age of Empires II: Definitive Edition runs natively on Apple Silicon, with no extra software needed.

Counter-Strike: Global Offensive has an official Mac build that runs on Apple Silicon through Rosetta 2.

Trombone Champ has an official Mac build that runs on Apple Silicon through Rosetta 2.

War Thunder has an official Mac build that runs on Apple Silicon through Rosetta 2.

A Hat in Time has an official Mac build that runs on Apple Silicon through Rosetta 2.

Bloons TD 6 has an official Mac build that runs on Apple Silicon through Rosetta 2.

Euro Truck Simulator 2 has an official Mac build that runs on Apple Silicon through Rosetta 2.

Farming Simulator 19 has an official Mac build that runs on Apple Silicon through Rosetta 2.

Bridge Constructor runs natively on Apple Silicon, with no extra software needed.
See Parallels in action
An official walkthrough from Parallels of playing Windows games on an Apple Silicon Mac.