Highly advise watching this insightful video by Jarkin when it comes to the Marathon Art Style (Graphic Realism)
I plan on making a detailed video of my own breaking down the top to bottom process of how I've synthesized this art style. From individual graphic design elements to fully realized environment designs in Blender.
I'm gonna stop posting Marathon art for now. Go check out the whole art blast on ArtStation. There's too much stuff to post everything.
I can't imagine how much fun it must have been for the whole team to pour so much creativity into the game. Outstanding. Just outstanding.