Schrodinger Hero (2016)

シュレディンガー勇者 (Schrödinger Hero) is a partnership game from Japan published in Japanese with English rules.

Players belong to either the Hero's side or Satan's side, and their objective is to defeat the leader of the opposite side. However, no player knows any player's identity, including themselves, and their identities often change.

Each player is dealt one identity card: Hero, Satan, Hero's friend, or Satan's servant. During your turn, you can gain a clue by looking at another player's card or by exchanging your card with other player's. When a player looks at another player's card, that player's comment or expression can also be a clue.

Only the Hero can defeat Satan, so even if you know who Satan is, you cannot defeat Satan until you have the Hero card, and vice versa. Unlike Werewolf, this game doesn't require a moderator, and players aren't eliminated during the game.

Publisher's summary
プレイヤーは勇者陣営か魔王陣営に所属し、勇者陣営は魔王を倒すことを、魔王陣営は勇者を倒すことを目的としています。しかし、最初は誰も自分の正体を知りません。プレイヤーは自分の手番に、他人の正体を見る、もしくは他人と正体を入れ替える事が出来るため、それらの行動を活用し自分と周囲の正体を把握していきます。正体を見た際の表情や言動もヒントになることでしょう。
夜の襲撃フェイズや人狼同士の顔合わせもないため、ゲームマスターが不要ですぐに遊ぶことが出来ます。プレイヤーの途中脱落もありません。