Here is the full list of all 12 Ghost Watchers achievements.
Throw the catcher into the river
Save up 10,000
Stay in the van for more than 10 minutes
Press the space bar 20 times
Сatch a Demon
Walk with a сrucifixion in hands for more than 5 minutes
Run with a torch in hand for 5 minutes straight
Catch a Child
Catch 5 different ghosts
Win without using a flashlight
Escape in less than 5 minutes after the start
Play a full-party game