First of many wargames based off Mobile Suit Gundam.　This game is covering the tactical level land battles in the story. Each unit represent a Mobile Suit, vehicle or Flak gun, but not include aircraft. The strength of mobile suit units is variable by attached weapons and pilots. The basic game engine is reimplements from Squad Leader. In each player's turn, turn player manage movement and combat for own units, and opponent player manage defensive fire. 9 scenarios represent various situations based on story. Victory condition vary by scenarios, but mostly condition is destruction of all opponent units. First edition rule (used green ink) was bit unclear, and too complex for newcomer. Therefor the rule has been updated twice. In first time update, newly rulebook was printed (used blue ink), its insert to reprint box, and also exchanged for former edition users. In second time update, was published on the Tsukuda Hobby's "Operation" magazine volume 1. This game reprinted in 30th anniversary from Mega House.