AKA Ougon no Shiro (黄金の城, lit. "Golden Castle") and Great Gurianos (European PC ports)
The player controls a gladiator/knight named Great Guaranos as he walks through a castle. Moving the joystick left and right moves Great Guaranos left and right, and up and down is used to position Great Guaranos's shield. The game's three buttons correspond to a high, medium, and low attack with Great Guaranos's sword. Gladiator consists of 4 Stages. The first level is the 'Underground Chamber', 2nd is the 'Brick Corridor', 3rd is the 'Roof Top' stage, and the 4th stage is called the 'Mysterious 4-D World'. Your reward for completing the game is to enter the "Treasure Place".