La Citadelle du Chaos is a homebrew Genesis game and an unlicensed adaptation in French of the Steve Jackson adventure gamebook The Citadel of Chaos first published in 1983. As a typical Choose-Your-Own-Adventure game most of the game consists of text with a few illustrations. At crucial points various options are presented to proceed, leading to different outcomes. The story tells about an adventurer magician who is on a quest to locate and confront the wizard Balthus Dire. To reach him a citadel needs to be navigated. He needs to avoid monsters and collect artefacts to gain access to the inner sanctum.
At the start of the game a hero is created based on dice rolls determining ability, endurance, chance and magic points. Magic points can be divided over twelve categories such as fire, force, levitation, luck, protection, telepathy etc. Game options include automatic or custom hero creation, toggling the scenario text, text speed and font selection.