Verdun was a game unlike any other wartime first-person shooter. The focus on World War I in a pre-Battlefield 1 world stood out, and trench warfare inspired a focus on more tactical, patient gameplay. It was an absolute blast for anyone wanting a change of pace or just a historically influenced shooter.
Tannenberg, by the same developers, is moving across Europe to the eastern front. World War I consisted of a handful of theaters, all unique in warfare and battle tactics. As such, Tannenberg takes a different approach to map design to keep the formula fresh while still maintaining that same level of historical accuracy and love found in Verdun. I just wish more people were playing it…
Source: Destructoid Review: Tannenberg