GTFO: ALT R2C2 - ???

Yep, this mission is actually named ??? and unlike other times where I say "we haven't been playing GTFO" this time we certainly have been but this level is really up there in terms of BS with the only good news being there aren't any scouts. The job is to recover 7 IDs (out of 9ish that randomly spawn) and then get back out but the main problem is that there is an endless alarm which means you'll have groups of 4 striker/shooters coming at you every 45 seconds. Hope you are good in melee! Also I only discovered now that the strikers also aim for your head so with good timing you can just crouch to evade their tongues (much like shooter blasts). Our loadout was as follows:

Me: Pistol/Revolver/Cfoam/Spear (team 1)
DL: DMR/Sniper Rifle/Mines/Hammer (team 1)
Jim: Double Tap DMR/Combat Shotgun/Auto Sentry/Hammer (team 2 - terminal duty)
[Bot]: DMR/Hel Gun/Biotracker/Hammer (team 2)

Expect to run this a few times to get used to where cabinets, turbines and cells randomly spawn. Terminals and the disinfection station are in fixed/stagnant positions. Artifacts that improve hack lock skill are handy, as well as a notebook/pen and paper for whoever is doing the terminal (for us it was Jim). Feel free to sprint as there are no sleepers until the last parts anyway just to really screw you over. Here is what worked for us in the end.

From the drop rush to open the big door straight ahead (team 1) and the one to the right (team 2), the idea being to save them for an upcoming hold. If the scum spawn out with you then its good! Fight first and then get the doors open. Team 1 should then go open the door to the left (if its still there) while team 2 who opened the right door sweeps into the next room, following the right wall of the next room to open the next door and loop back out and both teams return to the starting drop room. There's a terminal here on the right side if you are facing away from the hole, and one of you needs to find where the easiest 7 IDs are from here while everyone else defends. You don't need to go into every room!

Once that's done sweep into the next room and make sure you find the tools for c-foamer and ammo for everyone. Open the non-alarm team scan door at the back and there's another terminal just overlooking the stairs (just turn left as you go up). Team 2 stays at this terminal to ping a cell, fog turbine and resources for team 1 to get (split up) opening the two doors dead ahead and to the right. Team 2 can help loot once the cell and turbine are located and bring everything back down to that big dark room with a security door down some stairs in the fog. The generator for the cell can be found by following the stairs down from first scan door you opened and then following the left wall.

Next part is important: wait for the wave of four and your cfoamer needs to get to the middle door (the one looking at the starting drop room) to shut and ice it while the enemies are killed. Then Jim usually closes the door near the fog alarm and DL closes the back door then everyone has to get to the fog alarm door (ideally someone holding the turbine) and get the thing going. If you are lucky the wave will come from the starting drop room which means the cfoamer has just enough time to sprint up the stairs to continue to hold it while your allies do circles and kill flankers. DL usually comes along to put a mine facing the door too at this point. Unlock the door and survive until its back down to the four chasers.

When ready get the fog turbine and you're going to need to march through the fog. Speed is important but as the turbine guy can't run you do have time to unlock some boxes if there are any en route. Follow the right wall and go through the big door and the next big door just beyond that. Feel free to close these behind you but just be careful because sometimes the [Bot] loses pathing here like an idiot which will cost you the run. After the 2nd door you want to follow the left wall to stay up on a metal walkway and someone not carrying the turbine should eat some infection to run ahead and hack lock the small door just around the corner.

Get everyone in there, kill the 4 chasers if need be, then seal the small door, foam the big door to the a left and get started with the security scan on the right. This is a quick scan but you can also quickly die here if you aren't on your game (or the bot decides to take a scenic path when you start it). As soon as the door is unlocked open it and go up the stairs out of the fog (drop the turbine). Fight everything else up here and find more stairs up to locate a disinfection station to cleanse everyone.

Immediately beside you is a blood door. Are there IDs that you need in there? If yes that makes it simple as you can open it now, but for our winning run the answer was no, so we pushed ahead to the small door in the corner which opens into a big chamber with another blood door down some stairs. We did need this one, but it needs power so we just had to go across to the no team scan / no alarm door at the opposite end which leads to the zone with a cell and a fair amount of resources. NOTE: This zone and the zones beyond all blood doors has sleepers. Giant sleepers too. You don't have time to be sneaky though so just shoot em.

With the cell in hand return to the corner between the door you used to enter here and the blood door with stairs down which is where you'll find the generator. DL then setup mines for the downstairs blood door and opened it with the usual hybrid pair and small guys coming out (+ any sleepers that heard the blast). Can't really help much with this next bit but "go in and find the IDs". Yep. They are always in lockers or boxes so stick together, communicate and you'll be ok but don't waste time.

After our first batch of ID's are collected we need to go back through the fog zone, so get the turbine and again follow the right wall which will lead to a terminal here. Ping the ID's while your team protects you, then pick up said IDs and make your way out.  For us we now had to go to the final/first blood door which needs a key (you'd have picked this up while searching for the other IDs) so again, setup (careful of mine + 4 spawners) deal with the hybrid pair + regular monsters + sleepers that wake up and get in there. Get however many IDs you still need (for us it was 1) and run back to the extract as five giant strikers spawn in to give chase. DL got cut off and did not make it, but I think he delayed them for a long period. That said the extraction scan is really slow too, which means we still needed to win against the big boys (+ the endless spawners). Somehow, we did and managed to GTFO!