So I played my first round of Secret rotation Alien today.
I was the Captain as per usual, 21 other people on. I grab my shit, go up to QM and see a body with aliens all around it. The Mechanicus chaplain, some assistant and I ran like hell when we saw them. We came back with welders and stormed the place, it was covered in weeds and there were a few eggs. I destroyed an egg and attacked a soldier, killing it. The queen pushes me out and knocks one of my allies on his ass and kills him alongside the others. We ran away again.
Later, about 10 minutes, the station is out of power, the aliens are running rampant killing every other person that crosses their path. I grab a welder and charge the Zeta shuttle wing with a bunch of my allies. After a heated battle resulting in the death of another alien, we were taken down and I got killed. The aliens went on with infesting the ship for about 5 minutes, then the admin respawned all the dead. I ran like hell and got facehugged instantly. I took control of my body's larva. The shuttle was called. I grew up, became a soldier and left the main hive (the alien queen put on her trollface mask and made the hive in arrival) and went hunting.
The botanist was a dumbass and kept working even though aliens were killing everyone, so me and another soldier pried open the airlocks and busted him down. We then went down south maintenance where we found these 3 guys trying to pry open a door, one had a welder. We rushed them, knocked a couple down then the guy with the welder killed my ally. I ran away and came back later, they were gone and 2 were up at the disposal airlock leading to the hallway. Me and an ally staked them out in plain sight, afterwards we charged and killed the guy with the welder. I ate his body while my ally stabbed the other guy to death, then the round ended.
Fun times.