The people of Radlebb Keep are worried: Undead and werewolves have been seen in the nearby forests, and rumor has that a vampire has taken residence at Koriszegy Keep. Lord Korrigan hires a group of adventurers to dispel the rumors. They soon find out that not only the rumors are true, but that there are also other evil forces at work in the area.
Order of the Griffon is an RPG set in the world of Mystara, using the Basic/Expert edition of Dungeons & Dragons rules. The game features well-known monsters, magic items and spells from D&D. Gameplay conventions are similar to those found in Gold Box titles by Strategic Simulations, Inc: towns and dungeons have a first-person view, while overland travel is on a large map of the area. Combat with monsters is turn-based and takes place on a tactical screen.
A party consists of four characters, which are predetermined and cannot be created. There are 21 different characters to choose from for each party.