2012 · ソースブック（プレイを拡張するルール／オプション）
A Time of War Companion
This expansion adds advanced rules and campaign tools to the BattleTech role-playing game. It introduces higher-tier martial arts, hero mode, metaskills, Trait Checks, new technologies, and character design templates for creating or converting characters and non-player characters. Gamemasters gain rules for building worlds, designing exotic locations and fauna, and introducing uncommon equipment and threats. The material supports campaigns involving House soldiers, pirates, nobles, explorers, and other characters across the BattleTech universe.
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。