The Saboteur - The Saboteur mixes in the regular setting that many open world action adventures travel to simply by using a World War II theme instead.

Quake - Quake is a series of first-person shooter video games released by id Software.

Assassin’s Creed - Assassin’s Creed is a best long running and extremely popular series of open world video games which mixture of action, adventure and more importantly stealth into a single experience.

Call of Duty - Call of Duty is a first-person and third-person shooter series by Infinity Ward.

Middle-earth: Shadow of Mordor - Middle-earth: Shadow of Mordor sets you in the middle of The Lord of the Rings galaxy when you combat orcs using unique wraith expertise.

Xonotic - Xonotic is a free (GPL), fast-paced first-person shooter that works on Windows, OS X and Linux.