Quest for Glory IV: Shadows of Darkness/Rescuing Tanya

This quest is probably the one which gets most gamers stuck. You need to rescue the Domovoi in the Monastery by getting the Rehydration Fluid from Dr. Cranium, available on the fourth day if you give him the formula and a flask of grue goo. You also need to stay up until midnight at the inn to find the Domovoi sitting in the main hall of the inn. If you talk to him twice, once after you've rescued the Domovoi he'll tell you the story of Tanya and allow you to take the doll from the center cabinet that once belonged to her. The problem is if you don't do this in the first ten days or so you may never get the chance to meet the Domovoi.

In addition, all classes need to rescue the gypsy Davy and talk to the gypsies to learn about the Destiny Spell and how Erana's staff will allow one life to be sacrificed for another. Magic Users as well will need to learn the Ritual of Release spell from the faeries. Wizards need to the area south of Erana's Garden twice, and at least once after saving Igor. You'll find a magical fountain and staff on your two visits, both of which are illusions made by the faeries. You'll learn that the faeries want you to bring them back Erana's staff, and they'll teach you the spell you need to release it.