Microsoft stage:
Blood Gulch (Halo)
View attachment 352083
Blood Gulch is one of most known locations from Halo series, which it appeared in Halo: combat Evolved on Xbox in 2001. It's a desert that has human outposts and it has some parts of grass on the ground.
The layout of the map would be flat, but little bit rough with bumps on the ground to make it like in Halo game. There are metallic boxes serving as platforms here (There are stacked in random places) and the stage hazard is attack of Floods (The aliens from Halo), where they attack the players by biting them or latching on them and soldiers, who are shooting at the foreground, trying to kill the Flood aliens.
Meanwhile, Master Chief rides on the Warthog in Background and he defeats the Flood with Warthog's gun and soldiers go away while Chied saves the day.
(It also has Day-Night cycle)
I nominate Blood Gulch as Stage, because I didn't wanted him to make Chief as AT, so I made Halo representation in form of Stage.
Also having a stage based on FPS game would be cool.