Tannenberg is described as 'Experience authentic First World War action with 64 player battles of maneuver on the Eastern Front. Grab your rifle, ready your sabre and keep your gas mask close as you prepare to play a part in one of the most significant conflicts in history!'. There are more than 10 games similar to Tannenberg for a variety of platforms, including Windows, Steam, Mac, Linux and Xbox. The best alternative is Battlefield. It's not free, so if you're looking for a free alternative, you could try AssaultCube or Enemy Territory: Legacy. Other Tannenberg like games are Call of Duty (Paid), Halo (Paid), Squad Game (Paid) and Escape From Tarkov (Paid).
- 19 alternatives
- Battlefield is a series of first-person shooter video games that started out on Microsoft Windows and OS X with its debut video game, Battlefield 1942, which was released in 2002. Represent entire series of Battlefield games. View 46 alternatives to Battlefield
- AssaultCube is a free, multiplayer, first-person shooter game, based on the CUBE engine. Taking place in realistic environments, with fast, arcade gameplay, it's addictive and fun!. View 59 alternatives to AssaultCube
No more updates since Nov 2013 : http://assault.cubers.net/ (like Alien Arena, also noticed discontinued)
- Halo is a science fiction, first-person shooter video game series, that centers on an interstellar war between humanity and a theocratic alliance of aliens known as the Covenant. Represent entire series of Halo games including Halo: Combat Evolved, Halo 2, Halo 3, Halo 3: ODST, Halo: Reach, Halo 4, Halo 5: Guardians, Halo: The Master Chief Collection, Halo Infinite. View 47 alternatives to Halo