Monster Lair

aka: Wonder Boy III: Monster Lair
Moby ID: 13199
Arcade Specs
Buy on Genesis
$59.60 used on eBay
Buy on Windows
$0.99 new on Steam
Note: We may earn an affiliate commission on purchases made via eBay or Amazon links (prices updated 2/22 8:16 PM )

Description official descriptions

Wonder Boy III: Monster Lair is a quite different game to most of the games in the Wonder Boy series. You play a green-haired dude named Leo, who must attack the invaders that attempt to collect weapons and use them to destroy the land. The game starts out like a simple platform game, but it's just when Wonder Boy enters the skull further on that the game is transformed into a shoot 'em up, so basically the gameplay consists of action and shooter scenes.

In the action scenes, your vitality decreases as you make your way towards the skull, but this can be restored by collecting fruit. A wide variety of weapons can be picked up, and not only does these allow you to use the weapons for a limited amount of time, but they also increase your vitality.

In the shooter scenes, you ride your pink friend as you make your way through the scene. Here, your vitality remains static unless you are hit by an enemy passing by. As usual, there is a boss waiting for you at the end which you must defeat. Every boss changes color to show how much damage has been done to it. You have to defeat some bosses in two stages.

If your vitality gets low in each scene, you'll lose a life. You can also choose to have Wonder Girl join you, as two players can play the game.


  • ワンダーボーイIII モンスター・レアー - Japanese spelling

Groups +



Credits (Arcade version)

16 People (10 developers, 6 thanks)

Character Designer
Music Composer
Effect Designer
Special Thanks To
Presented by
  • Sega
  • Westone



Average score: 67% (based on 18 ratings)


Average score: 3.9 out of 5 (based on 23 ratings with 0 reviews)

Be the first to review this game!


Megadrive version

The Megadrive version of Monster Lair is notoriously inferior to the high-quality Turbografx CD port that had been released a year prior. Though technically decent, the Megadrive port is missing no less than five levels from the original arcade version: rounds 5, 6, 9, 12, and 13 are gone, which represents more than a third of the original arcade cabinet content!


MobyPro Early Access

Upgrade to MobyPro to view research rankings!

Related Games

Wonder Boy in Monster Land
Released 1988 on SEGA Master System, Amiga, Atari ST...
Wonder Boy
Released 1987 on SEGA Master System, 1987 on Commodore 64, 1990 on Game Gear...
Wonder Boy in Monster World
Released 1991 on Genesis, 2012 on Windows, 2018 on Linux...
Wizard's Lair
Released 1985 on Commodore 64, ZX Spectrum, 1986 on MSX...
Released 2007 on PlayStation 3
Dragon's Lair
Released 1990 on NES
Dragon's Lair
Released 1989 on DOS, Amiga, 1990 on Atari ST
Wonder Boy III: The Dragon's Trap
Released 1989 on SEGA Master System, 1990 on TurboGrafx-16, 1992 on Game Gear
Released 2005 on Windows

Identifiers +

  • MobyGames ID: 13199
  • [ Please login / register to view all identifiers ]


Are you familiar with this game? Help document and preserve this entry in video game history! If your contribution is approved, you will earn points and be credited as a contributor.

Contributors to this Entry

Game added by Katakis | カタキス.

Arcade added by Trypticon. Windows added by 666gonzo666. Macintosh, Linux added by Foxhack. Wii added by Parf. TurboGrafx CD added by DarkFalzX.

Additional contributors: formercontrib, Rik Hideto,

Game added May 9, 2004. Last modified February 12, 2024.