Adventure at the Chateau d'Or is a 2001 adventure game, developed and published by Karma Labs.
The player has been quested by a beautiful princess to find out the mysteries of a castle called "Chateau d'Or"
Gameplay is similar to Myst involving the player navigating through a series of static screens. The puzzles have three difficulty levels, and the game has a map feature helps the player move around. The game is primarily an adventure game, but includes some RPG-like elements.
Source: Wikipedia, "Adventure at the Chateau d'Or", available under the CC-BY-SA License.