For some reason this mission specifically stands out to me, especially after you point out that it's the 7th playable mission. There are a lot of random triggers going on in this map and the checkpoint is updated suspiciously often. A few things I've noticed:
- The objectives don't always go in the same order after the hospital objective, not sure if this is dependent on difficulty, some kind of trigger, or just random. I don't remember if I've ever done any objectives besides the hospital first.
- All of the loadouts spawn on this map (unconfirmed). I think the only one that doesn't spawn in the hospital is the active camo, which spawns in the reflections portion of the map (also unconfirmed). I know I've seen active camo though so if it doesn't spawn in reflections it probably spawns in SinoViet. In fact, after writing up this post I realized that when I beat this mission on legendary I was actually using active camo in the hospital when the jetpack guys spawn.
- SinoViet (the office building for one of the jammer objectives) has a green arrow for a logo. On top of the building and I think inside there are tons of these pointing in random directions. Could be some kind of organization to them.
- I've found multiple gray rooms most likely used to just spawn marines and covies etc. However, some of these rooms can be opened before certain objectives are met. I don't think this is important but it could wind up being a part of something larger.
- At the beginning of the map when you enter the falcon multiple strange things happen:
+ Right to the left of the initial falcon pad, two banshees chase down and blow up a marine-piloted falcon. You can save this falcon by destroying the banshees, but it proceeds to fly off the map. (I don't know if this happens every time but I think I have a video of it). This hasn't happened to me again yet, must have been random.
+ Right to the right side of the same pad, a burning building collapses very quickly. I've flown around this in theatre and haven't noticed anything suspicious.
+ There is a pelican (that is the name for the bigger ships right?) that flies by the landing pad, stops on a random rooftop, and then flies away (again I don't know if this happens every time). I've tried jumping on top of it while it is motionless, but when it flies away you just fall off. I've noticed pelicans doing this action during the whole mission. They always fly off the map afterward.
- During the SinoViet jammer objective, I think you can choose which elevator to take. When you come back down the elevator, both become dysfunctional and open and close small increments constantly.
- When you enter the hospital, it is possible to sneak by the initial sleeping grunts. I may have a video of this saved, I've done it running in both directions. However, the floating orb guy has spotted me multiple times, and I haven't made it to any lower levels without being spotted by something. Firing guns inside or even around the perimeter seems to wake everyone up. Active camo may help here if it's possible to get inside reflections before doing the hospital.
- The maximum height is 2500 and the minimum is around -75 or so. Flying below the minimum explodes you.
- Banshees are able to be hijacked and flown. Enigma and I flew one into the hospital all the way down to the jammer. I assume one can be flown into Club Errera as well.
- After closing down the jammer in the hospital jetpack elites spawned for me on legendary. However when I played this mission on co-op with enigma (also legendary) they were jetpack brutes instead for some reason. Debunked by Kevoun
I'll probably post some more things as I remember them. I think it would be beneficial to make a map of this board and start compiling data on objective orders, difficulties, enemy spawns etc.
Sorry for the long post, I just started writing out stuff I've been thinking about and it turned into lots of stuff.