Dolmen is an action-RPG that drops players onto the hostile alien world Revion Prime. Players must explore, gather "Dolmen" crystals that link realities, and survive dynamic combat that blends melee and ranged weapons with an energy-management system. The game features a progression system that strengthens the character with each battle and an "Energy Mode" for powerful attacks. A Day One Edition for Xbox Series X includes the base game plus the "Rebel Set" DLC, which adds extra weapons, armor skins, and in-game currency.