Ghost Hunting Forum

Hey there, I stumbled upon this forum because of the many ghost-related stories. But I'm actually building a ghost hunter game but I'm lacking experience.

Therefore I do have a few questions:
1. What kind of paranormal activity have you seen?
2. Did you try to find out where it comes from and why it is there?

For the people who are interested, I'm going to use this as inspiration for background stories for this ghost hunting game:
https://play.google.com/store/apps/details?id=com.sixdots.ghostly

Maybe a youtube video could help.