He played 90 minutes of the sp on PS4.
"It's just got that old school Doom, Serious Sam vibe to it, where you'll blast through a corridor of relatively low level scrubs, no reloading, you just keep on the move, and then you'll enter more of an arena area, which is locked down until you managed to beat the waves of ever increasing in difficulty hell demons that want to rip your face off."
I'll ignore the conflation of Doom and Serious Sam, and focus on the confirmation that you fight fodder to fill in the spaces between the literal arenas, which is what we'd all seen so far.
I noticed he was at 30 health, picked up Haste, and it refilled his health up to 175. I've also noticed he gets a LOT of health from most Glory Kills, going from 39 to 99 from a single monster (and saying +50 when getting 60 health in several smaller ticks).
I also noticed the robotic autopsy being done on a demon, which reinforces that whole morally gray, demons were being used as a resource story line brought to us by the guy who thinks FPSes are only useful for venting adolescent anger.
I did see a small bit of infighting, which is nice at least. Also the opening shot in the video of the BFG clearing a room is cool, but, well this sums it up: I need good level design, impact for my decisions, and for demons to be demons, not misunderstood alien animals from another realm.