"Commander's Edition" was, effectively, a ground-up rewrite of the rules. The old rule-number system was discarded in favor of a completely new alpha-numeric system. The three Expansions were scrapped and re-packaged. However, other than the new (bigger) reorganized rulebook, the initial 1983 release of the boxed set was mostly unchanged from the "Designer's Edition", including the box (later printings labeled it "Star Fleet Battles: Volume I"). The separate "Star Fleet Battles Commander's Rulebook" was also available for previous owners of "Star Fleet Battles".