2012 · ソースブック（プレイを拡張するルール／オプション）
Field Manual: SLDF
This sourcebook examines the Star League Defense Force, the military organization that protects nearly 3,000 worlds in the twenty-eighth century. It covers the force’s history, structure, training programs, fleets, BattleMechs, aerospace assets, and role in maintaining order among the Inner Sphere’s Great Houses. Special rules allow players to create Star League forces for campaigns set before the fall of the Star League, the Amaris Coup, and the Succession Wars.
スキルベース（スキルを購入または獲得）属性／ステータス制（STR、CON、PERなど）ダイス（主にd10）
ゲーム情報（人数、プレイ時間、対象年齢、クレジット）の出典：BoardGameGeek。