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You will play SU, a girl from the future who, for some reason, can freely travel through four-dimensional space, entering different times and spaces. You need to gather clues, solve puzzles, and use the collected clues to use deductive reasoning to uncover the mystery of SU's life experience.

Player counts over time, as we observed them.
Source: Steam Web API, ISteamUserStats/GetNumberOfCurrentPlayers. Full methodology
| Month | Average | Change | Change % | Peak |
|---|---|---|---|---|
| October 2026Oct 2026 (so far) | 0 | — | — | 0 |
Average and peak concurrent players each month, and the change in average players from the month before.