Belgian serious games developer
Playing The Past is working on a World War I simulation for documentary purposes (a certain region in Belgium was on of the most important battle fields during Wold War I). The interesting thing about this simulation is that it is aiming to be historically accurate. I heard something like you play a soldier who gets killed the minute he fires a weapon.
And they tend to make mods with first person shooter engines. So it's kind of nicely perverse.