2006 · ソースブック（プレイを拡張するルール／オプション）
Cretasus Adventure Guide
A campaign setting and sourcebook for adventures on the prehistoric world of Cretasus. It details the history and settled regions of the Main Valley, including New Savannah, Fort Tecumseh, and Plesiosaur Bay, along with dinosaur behavior and their interactions with humans. The book includes prestige classes for Dino Warriors and Federal Marshals, adventure ideas, town-generation guidelines, treasure and encounter tables, and game-master reference material. It also provides d20 statistics for 22 prehistoric creatures, including seven marine monsters and the alien Scray, plus rules for vehicles and the Union’s ironclads.
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）レベル制（XPを獲得してレベルアップ）
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。