Joe said:
Really, I only see this working if it doesn't adhere to modern genres. I'd imagine playing an officer/trench commander would be pretty fun, where you'd get your rifle and sidearm and be in charge of everyone else in the trench. You could order a charge, retreat, fire your gun FPS-style, mess with formations, and actually manage life inside a trench network.
Say you're playing on the far end of the trench and it's your job to keep the enemy from attacking your exposed side. You'd have to be able to shoot, get a message to the middle that you're being attacked, get your troops aligned to properly repel the charge, and organize a counter attack. It would be far less run-and-gun than a typical FPS and would focus more on decision making than twitch combat. Almost an RTS, but you're eye-level with the field and your resources come once a month.
You know, I've played and enjoyed a game with that same general format, except it was a Third-person instead of a first-person shooter. It's called Battalion Wars, and it was for the Purple Lunchbox. It's part of the Nintendo Wars series (I.E. Advance Wars), and you play as one of the many units in your battalion while directly controlling all the others. So you control tanks, planes, and infantry, and it worked fairly well...
I hadn't thought of a WWI game that way before, and it might turn out better than a plain FPS...
But I would like to say one thing to everyone who cries out about Trenchfoot and machine guns...
You would rather take on an entire platoon of Brutes and Grunts by yourself, or the monsterous Brumak with a friend, than take on some paltry earthwork defenses with countless other soldiers at your side? Not only are you guys wusses, you're Hipocritical and just sad. Indeed, WWI wasn't about heroism and machoism, which is why it is a story that should be told. In an era applauding games that make you question your morals as a gamer like in Bioshock, or entire levels devoted to you DYING like CoD4, why CAN'T there be a WWI shooter at all?
It's just amazing that no-one has bothered trying to make one, and I just wanted to bring that to light without hearing "Trench warfare sux!!"