Talk:Operation: Shadow Debt/@comment-78.112.77.95-20160128104303/@comment-27197089-20160128180755

It's possible the mechanics of spawning are different per mission. Defense/Intercept are the exact same spot every time, down to the pixel. Extermination is def not based on kills since I've spanwed them without killing any. I'm hesitant to think it's time based at least for Cap/Sab since I've had them spawn the moment I go into ther next room. I've also had them spawn continuously in the same room with missions that have limited tilesets. For instance I recall doing a Sab 6 times and all 6 times they spawned in the same room though the room was in a different location on the map. The most confusing occurance is when they spawn nowhere near you and y ou can't even get to them in time.

I think the times you don't see them spawn is most likley because when their HP timer is up (they change planets) it prevents them from spawning even if you entered a valid mission. It's how alerts used to work.