Shadows of Darkness is the fourth Quest for Glory game. It is a journey into the land of Mordavia - a setting influenced by Eastern Europe, particularly its Slavic areal. The hero had just begun to enjoy his victory in Tarna, when a spell zapped him into parts unknown, without a weapon, items, or even a source of light. Shortly after finding his way out of the dark cave, the hero meets a mysterious woman named Katrina. He traverses the swamps in the dark forest and finally reaches the town. However, the town is also engulfed by a foreboding atmosphere, and the hero cannot allow himself to relax. He must find out what is going on, why the town inhabitants are so hesitant and reluctant to help him, and what horrors are lurking outside of its walls. Life has never been quite so dangerous for our hero. He'll discover his quest soon enough - that is, if he lives.

Like the previous Quest For Glory titles, the game is a combination of puzzle-solving adventure and role-playing. The player character can be a fighter, a thief, a magician, or a paladin. Importing a character from a preceding installment of the series is also possible. Once again the hero improves his skills by repeatedly using them (like throwing stones at a tree to improve the throwing ability, which might be needed to solve a puzzle).

Combat system in this installment has undergone a major change. Battles are viewed from a side-scrolling perspective and are action-oriented. The protagonist is able to move freely, jump, and execute attacks and defensive moves, similarly to fighting games. The CD version of the game adds voice-overs to conversations as well as narrator's voice to text descriptions.