2010 · キャンペーン設定（ゲーム世界）
Ertha's Realm
A fantasy roleplaying supplement about Ertha’s Realm, a vast subterranean world of caverns, tunnels, hidden cities, exiled elves, and fungals. It presents the Underearth as an environment for extended exploration rather than a series of isolated dungeons. The supplement provides rules for light, sound, movement, rope use, and tight squeezes while spelunking. It also details a minor god of underground exploration, an alien fungal deity, a new hazard, and eight subterranean monsters.
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。