Aside from the arcadey games like Battlefield 1 and Cry of War, I haven't come across a really good WW1 tank simulator yet. i think there's also several WW1 mods for the Arma series that I've heard good things about.
There has been speculation that it
might come to IL2 Sturmovik: Flying Circus... IL2 is a flight simulator, however they have expanded with drivable vehicles/tanks for their WW2 theaters, and it's done really well. With the volume 2 of their WW1 themed Flying Circus expansion, there has been a lot of people requesting tank module implementation, but nothing has been confirmed.
The legendary IL-2 combat sim series today consists of two big universes—the Great Battles series, including 110+ aircraft from both World Wars plus WWII ground vehicles with detailed cockpits and compartments; and the Korea series, built on a next-gen engine and set in the 1950s during the...
il2sturmovik.com
I'll let you know if I hear anything