Xonotic - Xonotic is a free (GPL), fast-paced first-person shooter that works on Windows, OS X and Linux.
Saints Row - Saints Row is an Action-Adventure, Open World, Exploration, Third-person Shooter, Single and Multiplayer video game created by Volition, Inc.
Quake - Quake is a series of first-person shooter video games released by id Software.
Watch Dogs - Official Website. In Watch Dogs 2 play as Marcus Holloway and team up with Dedsec to explore the hidden dangers of ctOS 2.0. Available now for PS4, XBOX One, and PC
Counter-Strike - Counter-Strike is a PC-exclusive FPS video game developed by Valve Corporation.
Mafia III - Mafia III is an Action-Adventure, Open World, Stealth, First and Third-person, Sandbox and Single-player and Shooting video game published by 2k and created by the famous company named as Hangar 13.