Successfully completing contracts earns you money and experience. Higher levels unlock advanced equipment needed for more dangerous entities.
Use the game's speech recognition to talk to the entities... just be careful not to upset them. The Ritual: Following the Protocol
Finding and destroying totems or haunted items with your Geiger counter. Tips for the Professional Exorcist
Watch for negative temperatures—a classic sign of a haunting.
To narrow down the threat, you'll need to master your paranormal toolkit:
Shooting the entity with a Neutrino Gun or hitting it with Holy Water traps.
Using crucifixes or incense to create safe zones. Cleansing: Igniting incense to clear "dread origins."