You just have to do everything that can be done in that sernario, (example, like wild
things if you always fight the lion instead of the elephant you'll never get 100% check
online list to see what all other little nick-nacks you can do in each sernario, like
Underbelly and Flashback there are like 5 places where you can use the lighter to read
stuff and get items, its just little stuff you have to do to keep raising the % to 100
like running quick to certain areas to watch people getting grabbed or dragged away, try
look for a completion list online then check your sernario data and start ticking off what
you already done and do stuff you need to do, ^^ even simple as in Underbelly by flushing
1 off the toilets in the east or west bathroom goes towards the 100% sernario completing
list,