Seal of the Pharaoh is a light RPG with simple real-time combat and some puzzle-solving. The player takes control of the son of a prominent archaeologist, who has recently discovered the long-lost tomb of Rassius III and has gone missing. It is now up to the player to find him by exploring the tomb, but at the same time avoid the various traps and enemies laid out before them.
The game features first-person perspective as the player progresses through the pyramid, equipped with a club, a shield, and a diary. To progress, the player must navigate through the maze-like structure while avoiding deadly traps and battling enemies such as giant wasps, scorpions, and haunted urns. The protagonist can obtain more powerful weapons and items by exploring further and deciphering clues in the diary to solve various puzzles.
The RPG element is present in the weapon training system; as the protagonist uses a weapon, its effectiveness increases, resulting in higher damage inflicted on enemies.