2004 · ソースブック（プレイを拡張するルール／オプション）
What Went Down
A Russian submarine lies beneath the Arctic ice, and its crew’s fate is unknown. Players investigate the wreck, uncover what caused it to sink, and face the dangers of a remote underwater rescue. The setting introduces character classes such as Marine Biologist, Rescue Diver, and Salvage Operator, along with Oilrig and Navy backgrounds, underwater skills, and new feats. It also details the Erebus rescue sub and the Russian nuclear attack submarine Koloss, with guidance for expanding the scenario into an underwater salvage campaign.
- プレイ人数
- 0
シナリオ／アドベンチャー／モジュールダイス（主にd20）成長ツリー（スキル、職業、魔法能力など）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。