Rust Game - Rust’s world is harsh. The environment is not kind. Bears and wolves will chase and kill you. Falling from a height will kill you. Being exposed to radiation for an extended period will kill you. Starving will kill you. Being cold will kill you.
Xonotic - Xonotic is a free (GPL), fast-paced first-person shooter that works on Windows, OS X and Linux.
Arma - Experience true combat gameplay in a massive military sandbox.
Counter-Strike - Counter-Strike is a PC-exclusive FPS video game developed by Valve Corporation.
Ark: Survival of the Fittest - Ark: Survival of the Fittest is a Battle-Royale Style, Adventure-based Multiplayer Online Survival Arena video game created and published by Studio Wildcard.
Quake - Quake is a series of first-person shooter video games released by id Software.