2006 · キャンペーン設定（ゲーム世界）
Ptolus: The Spire
This supplement details two dangerous fortresses in the shadow of the Spire: Goth Gulgamel, the stronghold of Ghul the Skull-King and Half-God, and Jabel Shammar, the fortress built by the Dread One at the Spire’s summit. It provides room-by-room descriptions, adventure material for high-level characters, and ideas for staging a campaign climax. Full-color maps of both fortresses are included. The material supports city-based fantasy d20 roleplaying campaigns and can be used independently or with the other releases in the series.
属性／ステータス制（STR、CON、PERなど）クラス制（パイロット、ウィザード、サイエンティストなど）ダイス（主にd20）
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。