This was not what I expected. Going into God Mode, I knew it was an action-style third-person shooter which, to me, generally means there's going to be some streamlining going on. Less of the fluff you might find in bigger-budget productions, and more time spent doing what you're here for: shooting demons in the face while slowly walking backward.
Dropping all sense of a narrative outside of a seconds-long setup about you being the fallen descendant of a god who must battle through Hades for greater glory, God Mode throws you straight into the action. By comparison, the likes of Serious Sam, Painkiller, and the original Doom games feel bloated with their comparatively far-reaching storylines.
Bringing this point home, there is a single-player mode, but it functions exactly the same way as a round of multiplayer would, minus the companions. You literally "create a match" when playing alone and, a quick load screen later, you're in. No real fanfare. It was something of a shock early on, but thousands of demon corpses later, I've come around to developer Old School Games' approach.