1950s - Parker Brothers forms an affiliation with the Miro Company in France.
1957 - A representative of Miro approaches Parker Brothers with La Conquete du Monde (French for "The Conquest of the World"), a game designed by Albert Lamorisse. Lamorisse (a movie writer and director best known for The Red Balloon) and Micheal I. Levin are co-credited with the game design at BoardGameGeek.com.
1959 - Parker Brothers first publishes the Risk Continental Game in the United States.
1986 - The game Castle Risk (played on a map of Europe) is published.
1993 - The rules for Secret Mission Risk, which had been a variant in Europe, are added to the United States edition.
1999 - A limited edition of Risk is published in France, as 10,000 copies of Risk Edition Napoleon are released. An expansion in 2000 added the Ottoman Empire.
2001 - Risk players can now conquer the moon and underwater territories with Risk 2210 AD.
2002 - Risk moves to Middle-earth with the release of Lord of the Rings Risk.
2003 - Risk travels deeper into Middle-earth with the Lord of the Rings Trilogy Edition.
2004 - Risk: Godstorm is published, injecting mythology into the game of world domination.
2005 - Risk: Star Wars - The Clone Wars Edition is published in concert with the release of the third Star Wars prequel, Revenge of the Sith.
2006 - Risk: Star Wars - Original Trilogy Edition is published. The game features three factions, each with its own victory conditions.
2008 - A new basic edition of Risk is published by Hasbro.
Numerous unofficial expansions and new maps have also been published through the years.