There are many great Linux PC games that are well-supported and provide a great gaming experience. Some popular options include:
Doom Eternal: A fast-paced, first-person shooter game with intense combat and challenging enemies.
Ashen: An action role-playing game with a focus on player choice and exploration.
Hollow Knight: A challenging and atmospheric action-adventure game set in a mysterious, interconnected world.
Metro Exodus: A post-apocalyptic first-person shooter game with immersive gameplay and stunning graphics.
Shadow of the Tomb Raider: A thrilling action-adventure game set in the iconic Tomb Raider universe.
Dark Souls III: A difficult and immersive action role-playing game with a richly detailed world and challenging combat.
Terraria: A sandbox-style action-adventure game with construction, crafting, and exploration elements.
Total War: WARHAMMER II: A strategy game set in the Warhammer fantasy universe, featuring epic battles and a variety of factions to choose from.
The Witcher 3: Wild Hunt: An open-world action role-playing game set in a dark and gritty fantasy world, with complex characters and a rich story.
Rocket League: A soccer-meets-cars game that is easy to pick up and play, but also has a high skill ceiling for competitive play.
Keep in mind that this is just a small selection of the many great Linux games available, and there are many more options to choose from depending on your interests.