Hi @Statue115, the Martians not spawning sometimes is an old PC bug that is still in effect for mobile. A workaround is to start a different event (goblins, pirates) and once that event is cleared your Martian background should be gone.There are Martians in the background so it looks like they have arrived but no this is spawning and I went to spawn and still nothing. I reset my game multiple times and it didn’t fix it. I can’t spawn anything and I have to use my other device for a late game world to use