L'Aigle d'Or is an action-adventure game and the first episode of a series.
The location is Eagle's Castle in Westphalia. You start by buying equipment, such as a rope, for example. You can now start to explore the castle, room after room. It may be wise to draw a map, since the rooms look quite the same. In some of them, you'll discover secret passageways.
You move using the arrow keys and start actions using the first letter of the verb. For example, hit the "O" key to open a treasure chest. Collect items, keys and gold coins, use medicines if you need them, and beware of traps and monsters hidden in the castle. But remember, your aim is to find the Golden Eagle.