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.
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.
Counter-Strike - Counter-Strike is a PC-exclusive FPS video game developed by Valve Corporation.
Sleeping Dogs - Sleeping Dogs puts is an action-adventure game that puts you in the role of an undercover agent embedded in the seedy underworld of Hong Kong.