What's the hardest game to run on a PC?

Metro Exodus is the most graphically demanding PC game. Metro Exodus has the ability to use the full potential of the new graphics card lineup. The 2nd edition of the book, "Deus Ex: Mankind Divided". The 2nd movie, "Hitman 2." Far Cry 5 is a movie. 5 Kingdom Come: Deliverance. Project CARS 2 is a project. There is a shadow of the Tomb Raider. There are 8 Assassin's Creed: Odyssey.