We were inspired by A Letter from Whitechapel, an asymmetric hide-and-seek board game, and incorporated the hide-and-seek mechanism with a round moveable board: the OS can manipulate the board to confuse the technicians. We spent the majority of designing time on balancing the two sides so that both sides have similar chances to win while the game will not end too quickly. In later stages, we also provide different technician abilities and OS upgrades to make each game be able to provide players with distinct experience.