What type of activity does Grimm and D20 System have in common?
Grimm (role-playing game) Grimm is a role-playing game, released by Fantasy Flight Games. The current version is a standalone game using the Linear D6 system. The Linear D6 version is a significant expansion of the original material, including a more fully developed setting, a monster manual and game mechanics, all of which were previously provided by the core D20 System rule books.
Medieval fantasy Medieval fantasy is a subgenre of fantasy that encompasses the Middle Ages and sometimes simply represents fictitious versions of historic events. This subgenre is common among role-playing games, text-based roleplaying, and high-fantasy literature. It can include various elements of Middle Ages European culture and society, including a monarchical government, feudal social structure, medieval warfare, and mythical entities common in European folklore. In Denmark Peter Hesseloe is currently (as of august 2017) working on a roleplaying game system and API with same name: Medieval Fantasy.