High Frontier Interstellar

High Frontier Interstellar is a solitaire expansion to High Frontier Colonization that allows players to travel out of our solar system to the stars beyond. It can be played independently or as an extension of a standard (Colonization) game. To play you need all of the following: High Frontier High Frontier Colonization The free Interstellar rules available from Sierra Madre Games The Interstellar Map available on Zazzle.