Opus Castle
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.
- Release Date:11/9/2021
- Franchise:QUByte Interactive
- Developer:Messier Games
- Publisher:QUByte Interactive
- Last Updated:6/20/2025
- Steam App Id:1725660
Opus Castle
- Windows
- Mac
- Linux
Steam Charts, Stats, and Live Player Count
At the moment, Opus Castle has 2 concurrent players online and in-game. This is 33% lower than its previous all-time peak of 3 players achieved on 3/24/2025.
Opus Castle Review
Opus Castle has achieved a Steambase Player Score of 61 / 100. This score is calculated from 74 total reviews on the Steam store — giving it a Mixed rating. These are split between 45 positive reviews, 29 negative reviews, and will be updated in real-time as more players leave their feedback.
Track historical reviews and overall rating trends for Opus Castle using the chart below.
Opus Castle DLC
Opus Castle has 5 downloadable add-ons available for purchase on Steam which include Opus Castle - Chapter 4, Opus Castle - Chapter 2, and Opus Castle - Chapter 6.
| Image | Name | Type | Release Date | Actions |
|---|---|---|---|---|
 | Opus Castle - Chapter 4 | DLC | 5/12/2025 | View |
 | Opus Castle - Chapter 2 | DLC | 10/28/2021 | View |
 | Opus Castle - Chapter 3 | DLC | 5/12/2025 | View |
 | Opus Castle - Chapter 5 | DLC | 5/12/2025 | View |
 | Opus Castle - Chapter 6 | DLC | 5/12/2025 | View |
About Opus Castle
Opus Castle is an Action, and Adventure game developed by Messier Games. On 11/9/2021, it was released on the Steam Store by QUByte Interactive.
It can be played and ran on Windows systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.
According to Steam’s category system, Opus Castle supports the following features:
- Steam Cloud
- Steam Achievements
- Single-player
- Partial Controller Support
From the Steam community, Opus Castle has been tagged with the following user tags:
- Exploration
- Survival Horror
- Fantasy
- Dark
- Atmospheric
- Investigation
- Multiple Endings
- Story Rich
- Historical
- 3D
- Choices Matter
- Psychological Horror
- Linear
- Mystery
- Action-Adventure
- FPS
- Horror
- Survival
- Thriller
- Adventure
Media & Sceenshots
Watch the featured video for Opus Castle and see the latest screenshots from the Steam Store.
Supported Languages
Opus Castle is available in 2 different languages with varying levels of support for the in-game interface, audio, and fully translated subtitles.
| Name | Interface | Audio | Subtitles |
|---|---|---|---|
| English | Yes | No | Yes |
| Portuguese-Brazil | Yes | Yes | Yes |
More Steam Charts
Track historical trends for Opus Castle community hub members and its growth over time. It currently has 355 followers in its community.
Frequently Asked Questions
Soures & References
Steambase has best-in-class data powered directly by Steam, our data partners, and in-house experts. Data is enriched, cleansed, verified, and updated in real-time to ensure we surface the most up-to-date information. Learn more about the Steambase approach to data collection.
Opus Castle data has been sourced from:
- Valve Corporation. (2025, June 20). Opus Castle on Steam. Steam Store. https://store.steampowered.com/app/1725660
- Valve Corporation. (2025, June 20). Opus Castle. Steam Community Hub. https://steamcommunity.com/app/1725660
- Messier Games. (2023, July 8). Opus Castle. Opus Castle. https://messier.com.br/home/opuscastle/