Utterly Mad

Honestly, even in films WW1 is mostly neglected.

I think one of the best WW1 trench warfare movie scenes actually came from that horse movie...Warhorse. I don't know, it was just so fun to watch those guys finally take a trench and then suddenly.
'Oops, does it smell like toxic gas in here to anyone else?'

Yeah...Trench warfare would make an amazing RTS/Basebuilding game. However as an actual soldier it could only work in a railroaded storyline sort of game.