2023 · キャンペーン設定（ゲーム世界）
Raiders of the Serpent Sea: Campaign Guide
This campaign guide presents a grim high-fantasy setting inspired by Norse mythology and Viking history. In Grimnir, raider heroes face ancient creatures, rival kingdoms, cursed gods, and the returning Yoten across a campaign for 4–6 players, advancing from 1st to 16th level. The adventure spans four acts and twelve chapters, with opportunities to build longships, raid settlements, conquer territory, and establish a clan. Expanded rules cover sailing, naval encounters, and raiding, while campaign tools track world events and player decisions. The guide also includes new backgrounds, creatures, NPCs, monsters, magic items, maps, and setting lore.
ソースブック（プレイを拡張するルール／オプション）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）ダイス（主にd20）
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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。