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Player counts over time, as we observed them.
Source: Steam Web API, ISteamUserStats/GetNumberOfCurrentPlayers. Full methodology
Opus Castle it's a 3D horror, adventure and mysterious game with a narrative based on the real tragic history of the little castle on Apa Street, located in the city of São Paulo, Brazil.

| Month | Average | Change | Change % | Peak |
|---|---|---|---|---|
| October 2026Oct 2026 (from 22 Oct) | 0 | — | — | 1 |
Average and peak concurrent players each month, and the change in average players from the month before.