Xonotic

Additionally, as a competition-oriented game, Xonotic has several specialized one-on-one duel modes. Xonotic’s most remarkable feature is its speed, which sets it apart from all other similar titles. The game doesn't just let you almost fly throughout the different settings, but even pushes you to do so. All the traditional techniques to move quickly are present in this game: ‘strafe jumping’, ‘rocket jumping’, etc. The speed of the movements, in combination with setting designs that work to its advantage, provide a dizzying game style that could be nausea-inducing for even the most experienced of players. Xonotic is a fun online shoot 'em up game that, despite being competition-oriented, includes game modes for those who only want to enjoy a couple of matches against other players.