Ravensburger Labyrinth Games

The aMAZEing Labyrinth (1986)	Master Labyrinth (1991)	Junior Labyrinth (1995)
Secret Labyrinth (1998)	Labyrinth: The Card Game (2000)	3D Labyrinth (2002)
The Lord of the Rings Labyrinth (2003)	Labyrinth Treasure Hunt (2005)	Master Labyrinth (2007)
Labyrinth: The Duel (2009)

(1986)	The aMAZEing Labyrinth	The original.
(1991)	Master Labyrinth	"Harder" version with more rules to getting the items, which are also not pre-printed on the tiles, but rather are on their own chits, to be randomly located within the labyrinth.
(1995)	Junior Labyrinth	Smaller board with less items to find.
(1998)	Secret Labyrinth	Circular board; simple combat mechanics.
(2000)	Labyrinth: The Card Game	Card game version.
(2002)	3D Labyrinth	Plastic 3D board.
(2003)	The Lord of the Rings Labyrinth	Novel/movie themed version, similar to Master Labyrinth, but with more tokens and slight rule changes to the cards and staffs; also includes rules for a variant game where tokens are not collected in numeric order.
(2005)	Labyrinth Treasure Hunt	Simultaneous play.
(2007)	Master Labyrinth	Master Labyrinth with simple combat against a dragon and guardians.
(2009)	Labyrinth: The Duel	Solo or 2-player game using the Labyrinth tile-sliding mechanic.