The main character in Nevermore: The Chamber Door lives in a strange world ruled by the forces of darkness. His main task is to stay alive, if possible, destroying the monsters he encounters. The character himself came to this universe, and is now trying to find a way out. He calls himself Raven, wears a mask and a burgundy cloak. His opponents are crowds of living dead who are armed with scythes. Bombs and elements of magic are used in the fight against enemies. You can pull your opponent to you to unexpectedly deliver a crushing blow. All the main actions take place in underground labyrinths, on the streets of deserted cities. In addition to ordinary skeletons, at the end of the stage, you should measure your strength with the boss. Even having gained experience, you need to make an effort to destroy the leader. After completing the level, the player enters the door, which takes you to the next location with monsters.

In Nevermore: The Chamber Door, bonuses are awarded as you destroy enemies. You need to use them to improve your warrior's combat stats. In addition, you are given gems as a reward. In some cities, prizes can be exchanged for equipment, clothing, and to replenish your vitality. The menu shows such qualities as attack, defense, and health. You need to constantly monitor these criteria and keep them at a high level. In addition, you can improve your abilities in magic, lethal strike, and endurance. Ultimately, the hero must find the door that will return him home.