Best free Linux "brawler" games

GAME GENRE - A video game brawler, often simply referred to as a "brawler," is a subgenre of action video games that emphasizes close combat, hand-to-hand combat, or melee combat. Brawlers typically feature characters or fighters engaging in fights against multiple opponents, often in side-scrolling or 3D environments. The gameplay usually involves defeating waves of enemies or engaging in one-on-one combat.