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:8/31/2025
- Steam App Id:1725660
Opus Castle
- Windows
- Mac
- Linux
Steam Charts, Stats, and Live Player Count
At the moment, Opus Castle has 1 concurrent player online and in-game. This is 67% lower than its previous all-time peak of 3 players achieved on 3/24/2025.
Review History Chart
Track historical review trends and overall ratings for Opus Castle. It has received a total of 74 reviews on the Steam store and achieved a Player Score of 57 (Mixed).
Community Hub Members & Followers Chart
Explore the cumulative breakdown of Steam community hub members for Opus Castle and its growth over time. It currently has 361 followers on its community page.
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.
Players have rated Opus Castle as "Mixed" out of 74 total reviews on the Steam Store. These are split between 44 positive reviews and 30 negative reviews — an overall 59% positive review rating.
It is available for gamers to download and play completely for free. The game also has a total of 5 DLC add-ons including: Opus Castle - Chapter 4, Opus Castle - Chapter 2, and Opus Castle - Chapter 3 available for purchase and download through Steam.
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 Achievements
- Steam Cloud
- 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.
DLC & Related Apps
Opus Castle is referenced by 5 other related apps in the Steam Store.
| 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 |
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 |
Frequently Asked Questions
Soures & References
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Opus Castle data has been sourced from:
- Valve Corporation. (2025, August 31). Opus Castle on Steam. Steam Store. https://store.steampowered.com/app/1725660
- Valve Corporation. (2025, August 31). 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/