Lack of coop was most likely due to performance constraints.

SnapMap shows that the game can only have 12 enemies simultaneously, which is a low number. Adding more players would force the game to lower the number of simultaneous enemies even more.

At least the number of enemies is higher than in vanilla Doom 3 (which only supported up to 4 players in multiplayer, btw).

Remember that this game isn't purely a classic Doom remake, it's a mix of classic Doom with Doom 3 (plus some new stuff). Features inspired by Doom 3, like the fully real-time lighting, does bring some constraints. 

The 12-active-enemies limit was probably the reason for the arena lockdown mechanics. The player must kill the demons for the engine to free some slots for spawning monsters in other areas. 

I never quite understood the appeal. Something like L4D or Vermintide that is specifically designing for co-op makes sense and is really fun. But running through levels designed for SP with someone else is just... boring and clunky.

I think in order for D4 to make that work it would need a different campaign designed specifically for co-op, perhaps with specific new mechanics. I don't think you can hold it against id for not providing that. 

Bought it yesterday for Xbox One.

1) It's the same story format as all previous ones: one guy against a whole army from Hell. Where does co-op even fit there?

2) Glory kills. OMG. GLORY KILLS. So. Satisfying. >:)

3) Any tips on fragging efficiently the shield guys? Anyone? I'm dying (literally) to know... 

Offhand grenade thrown slightly behind them, plasma gun alt fire stun work well for those dudes. 

Yah. Shotgun-grenade or rocket behind them also works peachy. Indirect fire in general. 

So...no horde combat? 

NO! 

Not just no horde combat, but also no active and roaming monsters. Everything is self-contained, and it is also why any time there is a sequence break in a speedrun, the level is suddenly empty, because the person missed a spawn trigger. They do what they can to mask it, but most everything is locked down and delivered in measured doses. The cost of that visual fidelity at 60fps on the Xbox One and PS4. And then they designed an upgrade cycle akin to the recent Shadow Warrior to fit in with it.

The only time I can think of where they aren't following that limit is 14-15 Possessed after you pick up the BFG. It's a money shot and a demo room. Otherwise, twelve monsters at a time, with intensity coming from ramping up the monster type. You won't get an equivalent to Doom's flood of pinkies, or sprinting across a risky area to an objective, waking up dozens of monsters, and having them roam the level looking for you until you finish it. You get small inconsequential groups, or hallways with them before you, or an arena. 

Also, the shield guys are quite slow to turn, so you can get behind them and unload a double barrelled shotgun before they have time to get behind their shields. 

And also, the remote detonation upgrade for the rocket launcher is perfect as you can detonate the rocket when it's just behind them. 

So they managed to make me completely uninterested in the new Quake, but the upcoming changes to Doom 4 will probably get me to buy the game. 

What changes? 

More game modes in multiplayer (including traditional deathmatch without stupid "loadouts"), Hell tileset and additional doodads in Snapmap, etc 

Classic DM and improved snapmap stuff (including Hell) seems like one of the better things in bethesdas conference. Shame we didnt get more Doom SP 

Can confirm my laptop can only run this at 10/5 fps with constant slowdown at the lowest settings, and mouse smoothing is so fucking wierd I can still feel it now.
I actually have a PC with a new graphic card, but it's been sitting here for two years because my power core isn't powerful enough to withstand it. I need one that goes either 800V or 850V.
Not that I need to upgrade that much since I rarely play games anymore (and the most recent game I played was Bioshock 2, on said PC but without the shiny "new" graphic card), and even less for D44m. I only wanted to check it out because hey free sample why not 

First, it's a PSU, not a "power core".
Second, it's watts, not volts.

Third, you don't need anything even remotely close to 700W (let alone more then that) unless you have at least 2 or more videocards in SLI mode. 

Not sure why they didn't have one in the first place!

Wow, great impression! Super fun and I am definitely purchasing it during the Steam Summer Sale. 

Interesting. The Xbox One version runs flawlessly, and remember that is a dumbed down Windows 10 on rather old hardware... Maybe there are other reasons for the framerate drop down. 

UT3 runs kind of okay-ish with small framedrops there and there and the thing kind of heats up when I run it, making my room feel like a giant toaster.
Maybe it's not a good unit of mesurement but I'll take that as a "it can run 7th gen game okay but don't think about going further than that" 

what actually is it? 

While my PC is gathering dust because I need a new PSU to support that graphic card I was given to, which has been collecting dust ever since I got it 2 years ago. 

Is interesting only when the two or more players do not start the map from the same location, but join later I the map for a final boss or horde fight

Else it is pointless 

Interesting. The Xbox One version runs flawlessly, and remember that is a dumbed down Windows 10 on rather old hardware...

Console vs PC API overhead. Lack of direct access to hardware on PCs. Easier to optimize for consoles because all XB1s have the same hardware so an optimization for one XB1 will hold good for all of them; likewise with PS4; definitely not the case for PC.

You just can't do a meaningful comparison between consoles and PCs if all you look at is hardware generations, clock speeds, etc. Consoles are just able to get more out of weaker hardware than PCs.

The Vulkan version, when/if it ships, should resolve a lot of this. 

+ plays very smoothly, proper fast action
+ mantling is really well done
+ the finishing moves are not annoying if you turn the indication off
+ amount of blood is good
+ intro to the game is nicely done
+ mars bit is great, feels like proper style

- I actually find the runspeed a bit high, it feels like I'm bouncing off walls a bit
- forced arenas are bland
- not seen many secrets
- insides are a bit over-coloured-lighting

It does feel a lot like what D3 should have been. So far.