This is a game of combat between ram ships moving at near light speed in the Great Nebula of Orion. Each player commands a fleet or ram ships armed with missiles, X-ray lasers, etc. The primary tenet of the game is Einstein's theory of special relativity and how it affects movement and communications. The game includes 7 scenarios which may last from 1.5 to 8 hours. Also included are advanced rules and notes from the designer on the game mechanics, concept, and how these relate to physics. - BoardGameGeek