Castle Must Be Mine
Developed by TheMiddleGray · Published by TheMiddleGray
At a glance
Overview
A casual, indie, simulation game by TheMiddleGray, published by TheMiddleGray — single-player.
Steam’s own one-line description: “Castle Must Be Mine is a KingdomRush-like tower defense game. But developed for VR. In addition to constantly collecting Coins to building and upgrading defensive towers, also need to make full use of all kinds of skills and props to stop the "enemies" into your castle.” — developer/publisher text via the Steam store page.
Reception & community
Review sentiment, ownership and peak-concurrent estimates via SteamSpy; tags are player-voted on Steam. Estimates change over time.
Features & modes
Derived from the gameplay modes and feature categories Steam lists for Castle Must Be Mine.
| Feature | Supported |
|---|---|
| Single-player | Yes |
| Multiplayer | No |
| Co-op | No |
| Online co-op | No |
| PvP | No |
| Cross-platform multiplayer | No |
| Full controller support | No |
| Partial controller support | No |
| Steam Cloud saves | No |
| Steam Achievements | No |
System requirements (PC)
As published on the Steam store page. Requirements can change between updates.
Minimum
- OS *: Windows 7 SP1, Windows 8.1 or Windows 10
- Processor: Intel® i5-4590, AMD FX 8350 equivalent or better
- Memory: 4 GB RAM
- Graphics: NVIDIA GeForce® GTX 970, AMD Radeon™ R9 290 equivalent or better, Video Output: HDMI 1.4, DisplayPort 1.2 or newer
- Storage: 1 GB available space
- VR Support: SteamVR or Oculus PC
- Additional Notes: 1x USB 2.0 or better port also required
Supported languages (1)
Castle Must Be Mine FAQ
Answered from the official Steam listing as of June 2026. Where something hasn't been announced, we say so rather than guess.
What kind of game is Castle Must Be Mine?
Steam classifies Castle Must Be Mine as a Casual, Indie, Simulation, Strategy game, developed by TheMiddleGray. Castle Must Be Mine is a KingdomRush-like tower defense game. But developed for VR. In addition to constantly collecting Coins to building and upgrading defensive towers, also need to make full use of all kinds of skills and props to stop the "enemies" into your castle.
How much does Castle Must Be Mine cost?
As of June 2026, Steam lists Castle Must Be Mine at $15.99. Prices and regional pricing change — check the Steam page for the current figure.
Is Castle Must Be Mine single-player or multiplayer?
Steam lists these modes for Castle Must Be Mine: Single-player. It lists a single-player mode.
Is Castle Must Be Mine on PlayStation, Xbox, or Switch?
Our data comes from the Steam (PC) store, which lists Castle Must Be Mine for Windows. Console availability isn’t in our Steam-sourced data — check the official site or the console store.
Is Castle Must Be Mine out yet?
Yes — Steam lists a release date of Jul 13, 2018.
What platforms is Castle Must Be Mine on?
Castle Must Be Mine is listed for Windows on the Steam (PC) store. Console availability isn't covered by Steam's PC store data — check the official channels.
Is Castle Must Be Mine single-player or multiplayer?
Steam lists these modes: Single-player.
How much does Castle Must Be Mine cost?
Steam lists it at $15.99.
Who made Castle Must Be Mine?
Castle Must Be Mine is developed by TheMiddleGray and published by TheMiddleGray.
Where to get Castle Must Be Mine
We don't sell games or track prices — this links to the official Steam store page.
View on Steam →Listing details from Valve's public Steam store data. Not affiliated with Valve/Steam, TheMiddleGray.