The battle of Vimy Ridge would be an amazing videogame level. Imagine attacking heavily fortified German positions that are up on a hill in the distance. Months prior to the attack, you've been raiding German trenches for information and to demoralize them, building tunnels underneath the battlefield to create a subway system that will let you pop out at moment's notice as well as ferry supplies back and forth, and informing each and every soldier where they're expected to be at what time on go day.
When the battle finally begins, you don't charge mindlessly towards the German trenches -- you walk behind a slowly advancing layer
of your own shells that tears the Germans apart. This attack, known as the creeping barrage, is a highly technical maneuver that requires each shell launcher to be perfectly caliberated and operated at the proper time.
As you reach the top of the ridge, help is sent to one of the attacking forces which has met unexpected machine gun resistance. On the whole, however, the battle is won relatively easily. It's one of the key WW1 victories and also one of the most interesting.
Running through 20 ft craters, trying not to be swallowed up by the mud, avoiding sniper fire, returning fire with your machine gun, charging through German trenches as they retreat to their second or third trenches... there's plenty of good game material here.
This is what it looks like today:
And no, that's not a golf course. BTW, 20,000 soldiers attacked simaltaneously on an area no longer than 12 kms... let's see the cell processor pull that off without a hitch.