What are some alternatives?
Mafia - Mafia is an Action-Adventure, Third-person Shooter, Open World, and Single-player video game developed by Illusion Softworks and published by Gathering of Developers.
Team Fortress 2 - Team Fortress 2 (TF2) is the sequel to the game that put class-based, multiplayer team warfare on...
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
Xonotic - Xonotic is a free (GPL), fast-paced first-person shooter that works on Windows, OS X and Linux.
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.
Half-Life - Half-Life is an Addictive, Commercial, Action-Adventure, FPS, Sci-fi, Co-op, Single and Multiplayer video game developed and published by Valve.