This game was inspired by John Kean's board game.

1. Objective of the game
　You are a skilled agent of the Secret Intelligence Service known as "Night Thread". It has been discovered that a double agent known as the "Dark Lady" has infiltrated the organization. Your mission this time is to identify the double agent, the "Dark Lady". The "Dark Lady" has three characteristics. Based on these characteristics, identify the "Dark Lady" within the allotted time.

2. Game Progression
　Turn 1 and Turn 2 are repeated for a given number of days.
Turn 1
　It's the move turn of the "Dark Lady". The "Dark Lady" moves to an adjacent town. One of your important tasks is to predict where she will move. If necessary, place the mark of the "Dark Lady" at the expected move destination.
Turn 2
　It's your (Night Thread) action turn. You can choose from the following actions:
　・Move (basically you can only move to adjacent towns) ※1
　・Investigate the "Dark Lady". ※2
　・See the instruction manual. ※3
　・Expose the "Dark Lady." ※4
　・ Pass an action turn.
　※1 When moving from headquarters, you can move to any town.
　※2 If your town and the town where the "Dark Lady" is located match, you can obtain clues. However, the number of days will advance for each clue, and the "Dark Lady" will also move. In addition, regardless of the success or failure of the investigation, a command will be issued from the headquarters. *See the Commands section.
　※3 Executes the action specified in the order. *See the Order section.
　※4 If your city is the same as the city where the "Dark Lady" is, you can reveal her. If your guess is wrong, the game ends.

3. Regarding the Directive
　Regardless of the success or failure of the investigation, a command will be issued from headquarters. If you carry out an action when you receive a command, the command will automatically disappear. If you do not carry out the action when it arrives, the opportunity to carry it out will come up at a later date. (Action "View Commands"). Commands carried out at this time have a 50% chance of being collected. When the remaining command is at 0, the game ends. The timing of actions must be carefully considered. The game also ends if you are unable to carry out the action in the command.

4. End of the game
　If you complete a mission
　　When you have successfully exposed the "Dark Lady". Mission accomplished. Congratulations!
　
　Unfortunately, the investigation may be discontinued.
　　When he failed to expose the "Dark Lady".
　　When the remaining investigation days reach 0.
　　When the remaining orders reach 0.
　　When an action in a directive could not be carried out.

Image material
Created with Canva and Microsoft's AI image generator

Music material
pixabay.com/
James Milor
Cyberwave-Orchestra
DOVA-SYNDROME/
Fukagawa