2022 · ソースブック（プレイを拡張するルール／オプション）
Shattered Fortress
In 3146, the Republic of the Sphere stands on the brink of collapse as the Great Houses compete for military dominance and the Clans seek a weakness in Fortress Republic’s defenses. With interstellar communications disrupted, the struggle for Terra and the title of ilClan draws the Inner Sphere into renewed conflict. This BattleTech setting sourcebook chronicles the twilight of the Dark Age through a year-by-year account of pivotal events. It explores the secrets of Fortress Republic and the decisions that shape the future of the Inner Sphere.
スキルベース（スキルを購入または獲得）ポイント制（ポイントを割り振ってスキルや能力を得る）ダイス（主にd6）
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。