Chamber of Darkness is a beat 'em up game, with some platforming elements.You play as a fearsome knight, looking for a way to break the curse of the spear that will absorb the knight's body if not fed by killing other creatures.
Actions with the spear like attacking or using abilities cost HP depending on what ability you use, and you regain the used HP by landing a successful hit. Enemies have a chance to parry your attacks and reflect your projectiles. You can choose up to 3 abilities before the start of the level.