Glima, which translates into "The Game of Joy" is over 1000 years old and was brought to Iceland by the Vikings.
In the modern day, Formal Glima is characterized by 4 key points and 8 basic tricks (bragd) using the legs, hips, and feet to throw.
[Source: Excerpts from "The Gripping History of Glima", Journal of Western Martial Art, 1999, Pete Kautz.