The problem with WW1 games is that companies not wanting to make a WW1 based game is not because they barely know anything about it, it's mainly because It's very hard to make a profit from it. It's not really entertaining for some people to play a game where you sit in a trench for months waiting for the enemy to attack, while the enemy does the same thing, called a stalemate.
Well, to be honest WW1 was unique, who cares about the game, I don't know if your British, french or whatever, but these brave men thrown there life's away for the stuff we can do today, well ww2 is more unique in this way but still, standing in a line and getting shot at may be brave but when they charge out of their trenches in ww1, because the machine gun had recently been invented many many of them died, more people lost their lives in ww1 than the Napoleonic Wars for the shit we can do today, those brave men, despite the Napoleonic wars went on longer, Total KIA, Wounded etc in WW1: 22,477,500, Total Kia Wounded etc in Napoleonic Wars: 3,350,000 to 6,500,000,
I understand a game would be boring, but the point is if we lost this war, the British "Myself" and the French would be speaking German.