Tokyo Metro x Quiznock, a digital round-the-clock riddle-solving game that takes players to various locations along the Tokyo Metro line to reach the goal.

Tokyo Metro will co-host a circular riddle-solving game, “Mystery Solving Underground Playground,” with baton, operator of QuizKnock, from November 25 to February 28, 2025.

The “Riddle Solving Underground Amusement Park” is a digital round-the-clock riddle solving game in which players use their smartphones to solve riddles and conquer games as they travel around various locations along the Tokyo Metro line to reach the goal.

The serial code for play is 2,400 yen, and the set of serial code for play and clear file bag with riddle solving paper (limited quantity) is 3,800 yen. The riddle-solving paper is an extra problem unrelated to the main game, so it can be completed without the paper.

Purchase the serial code from the special Web site and enter it into the Web site for the game to start the game. The game is completed when the final riddle is solved.

Since transportation costs are not included, the company recommends purchasing a Tokyo Metro 24-hour ticket, which sells for 600 yen for adults and 300 yen for children.

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