QuizUp - QuizUp gives you the opportunity to test your trivia skills against friends and strangers throughout the world.
Quake - Quake is a series of first-person shooter video games released by id Software.
Drawful 2 - Drawful 2 is a Strategy, Educations, Trivia, Single and Multiplayer video game created and published by Jackbox Games Inc.
Call of Duty - Call of Duty is a first-person and third-person shooter series by Infinity Ward.
Akinator - Akinator is an entertainment app that acts like a digital genie that can read your mind. The game will ask you a few questions about the character you have chosen, and it will attempt to guess the character from your provided answers.
Xonotic - Xonotic is a free (GPL), fast-paced first-person shooter that works on Windows, OS X and Linux.