2020 · ソースブック（プレイを拡張するルール／オプション）
Terra Firma
This setting guide expands Trinity Continuum: Aeon with information about Earth and Luna, including ten nations and a key city in each. It details revolutionary movements, dangerous cults, criminal gangs, and other threats facing Earth, along with strange locations such as the Gorgon Karst caves and the Hadley Rille Anomaly. The book also introduces Earth- and Luna-specific technologies, Nova Age relics, Edges, and Paths for use in campaigns. The Trinity Continuum Core Rulebook and Trinity Continuum: Aeon are required to play.
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）属性／ステータス制（STR、CON、PERなど）
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。