2002 · ソースブック（プレイを拡張するルール／オプション）
Horrors of the Wasted West
A d20 monster book for a post-apocalyptic setting, featuring monsters, mutants, misfits, mutated animals, legendary horrors, and sentient military hardware. It includes creatures from the original setting, more than a dozen new creatures designed for the d20 edition, and selected creatures from a related d20 game. The contents are compatible with d20 games and are intended for use with Hell on Earth d20.
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。