It was released on December 6, 2016, for Microsoft Windows, macOS and Linux,[2][3] in July 2017 for PlayStation 4 and Xbox One,[4] and for Amazon Luna on October 20, 2020.

The player commands a small team and performs various acts of espionage, sabotage and assassination, such as infiltrating heavily guarded fortresses and eliminating enemies from within, killing/capturing special targets, stealing important documents, overhearing conversations to collect information, or rescuing other characters.

The player can move the bodies of slain or unconscious guards to hide them in bushes, empty rooms, barrels and wells so that they would not be found.

If a player character is spotted or a dead body is discovered by the enemy, the alarm will be raised and additional patrols will be deployed to secure the area.

All the team members have a "healing" skill that restores health but can only be used once, and a matchlock pistol with limited ammunition (Mugen has a more powerful "hand cannon" that can kill enemy samurai).

The Shogun turns to Oshiro Mugen, a samurai in his service, and assigns him to uncover Kage-sama's true identity and bring him to justice.

Defeated, the general commits seppuku with Mugen's help after providing the group with a map that leads to a secret encampment in the marshlands where Kage-sama is hiding.

The events in the standalone expansion Aiko's Choice take place shortly after Okkoto's death and before the group leaves to confront Kage-sama in the marshlands.

While the shogun's agents are in their hideout at Nagoya planning their next move, they are ambushed by armed men, led by the kunoichi Lady Chiyo.

The three manage to escape and rescue Yuki from Chiyo's men, but learn that Takuma has already been taken to a nearby archipelago on a Portuguese ship.

Mugen and Aiko go on a private mission and steal documents from a samurai revealing his orders to recruit young women for Lady Chiyo.

The evening, while the others are preparing to enjoy dinner, Aiko secretly meets with Lady Chiyo, who explains that Kage-sama had come to her hoping to exploit the Sakura clan's former allegiance to him; angered by his deceit and wanting to be left alone, Lady Chiyo had arranged for Aiko and her allies to sabotage Kage-sama's smuggling operation before using her kunoichi training to fake her own death.