Shipping is included. An action game for the SEGA Master System, released in 1987. - Brand: SEGA - Game Title: Master System - Genre: Action - Model Number: G-42 - Release Year: 1987 "Tri Formation" (Overseas name: Zillion II: The Tri Formation) is an action-shooting game released by Sega for the Sega Mark III on December 13, 1987. Purchased approximately 30-40 years ago and stored unused in a dark place. It was opened for photography this time. There is some deterioration due to aging, but I think the condition is quite good. Please feel free to comment if you would like additional photos, combined purchases, or a discount.