Ever had the glitch on medium spaceships where every enemy teleports and appears in the same spot? I had about...
3 sectoid squads
2 super sectoids
2 mechtoids
1 mechpod thing
literally 7 or so zombie maker things... crystalyds
few groups of thin men
tons of mutons and a few muton elites
ALL of that spawned infront of my squad, one reveal cutscene after another until I was swarmed, it happened on ironman impossible too and how the hell I didn't lose a single member I do not know, only had 4 of em too, for the no squadsize upgrade achievement.