Mice and Mystics (1970)

The movie will be based on the Plaid Hat tabletop game, created by Jerry Hawthorne, which is a role-playing adventure following players loyal to the king who are imprisoned in a seaside castle and turned into mice by the evil Vanestra. They must fight their way out of the castle as they face dangerous foes including rats, cockroaches, spiders and the castle’s house cat, Brodie.