2013 · ソースブック（プレイを拡張するルール／オプション）
August 2013: "SSHHHH!"
Characters attempt to avoid an Encounter with unaware opponents, such as zombies that have wandered into their location. Players describe how they hide and move quietly, resolving the effort through a Perception–Hide check. They may instead choose to sneak past the opponents or eliminate them without raising an alarm, treating the situation as a tactical encounter with increased Risk and potential SP rewards.
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。