The new kid on the block here is FragPunk, an online competitive FPS that feels like a noisy flashy version of Counter-Strike blended with Valorant and the good news is the anti-cheat is enabled for Linux / Steam Deck.
Read the full article here: https://www.gamingonlinux.com/2025/03/competitive-fps-fragpunk-has-launched-on-steam-and-works-on-linux-steam-deck/