Unshakeable in 3.3 is a breeze now though.
Try Singularity, NOW that's a nightmareIt's just really repetitive (though I guess you could call that a nightmare) and you have to know exactly what to do or else you're fucked, including knowing where the snipers are and taking some chances because otherwise, what else will you do? Apparently, Virus can't survive a strike from a charged Tesla Coil (new?) across the road and you have to instead use the Ivans to blow the Tesla Coil on the hill around the windmill and send her through there to take a shock from a non charged T-Coil so it can be blown up. Terror drones and snipers give me the creeps knowing that they can just 1 hit end my hour long mission. And that was on Easy! I can't imagine (and won't for my sanity) playing on Mental.
I got stuck on Allied. I finally figured out that to kill the powered but damaged coil on the top on easy you have to either distract the coil or mind control the ivan right next to the tesla coil to destroy it.
As for the unpowered tesla coils in the hill, you don't need the Virus to take the hit. It was actually really simpler than it appears. The one around the windmill has tesla troopers that are completely reachable by the Psi Corps Trooper from behind the wall. Mind control one to distract the troopers that are powering the coil and it will automatically turn it off. That way your Virus can freely walk without the fear of getting electrocuted
That's what I did for the unpowered ones, I just mc'd the tesla troopers or Ivan'd 'em. I used my virus to take the hit of the damaged one that happens when you blow the barrels when the PsiCorps trooper comes out. For the allied part, its kinda tricky but I use a mind controlled Qilin to go ahead to the start. Using a raven of course, scout it all out and kill the sentry gun with barrels around it so you can go to the Soviet wall on the right side of the map. Take out the terror drone with malver, and basically use your best judgement to break through the walls and go around all the defenses. From there you're on the allied side, bottom right where the campfire is. Go north and be careful. Send your qilin ahead to block pillbox shots and stuff and send the virus to snipe the seals, and everything else blocking your way but don't get close to the sniper on the hill that gets revealed (where the sandbags are, you can cross them, just stay close to them. dont take chances with the sniper around). Mind control a siege cadre however on the road where you kill the seals, that's your key to kill all the pillboxes to the robot ops center, then send malver to blow it up. The elite battle tortoise you need to mind control to kill the Iron Curtain will be heading down the road you cleared to get to the robot ops center in the first place. Make your way thru the left of the map (crush walls with the Battle Tortoise), send your trio back to the start meanwhile before you destroy the iron curtain. Blow it, and hold your positions at the start once the map gets revealed. A whole ton of shit goes down, including a seal drop on the newly revealed side of the map. It's basically making sure you lure seals to their death and sniping people that come after you and Malver blowing shit up. Then you simply escape.