"Castle" is an adventure game in which you are exploring a mysterious castle and its surroundings and are trying to figure out what really had happened. Before you start, you need to select one out of four individuals you will be guiding through this adventure. You may choose between a fighter, a magician, a thief and a priest. Each of them has different characteristics' values like power, intelligence and skills. Walking around the place you may collect objects and interact with the scenery using set of command icons such as examine, pick up, put down, give, talk and attack. Movement is done using the direction icon in which you choose what direction you would like to take next. The game consists of 70 different locations to explore.