Wonder Boy 3: Monster Lair Arcade PCB. Monster Lair is the third game in the Wonderboy series from Sega. The game can be played by one or two players cooperatively, with gameplay involving a mixture of platforming sequences and shooting action.
The player controls a green-haired boy hero named Leo (player 1) or a pink-haired girl hero named Princess Purapril (player 2). The player is able to jump and shoot projectiles from a sword, and players gain health from fruit found throughout levels.