O Rei
Developed by Hagane, Lord Erin · Published by Hagane
At a glance
Overview
A free to play, indie, strategy game by Hagane, Lord Erin, published by Hagane — single-player.
Steam’s own one-line description: “Do you want to reign?” — 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 O Rei.
| 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 | Yes |
System requirements (PC)
As published on the Steam store page. Requirements can change between updates.
Minimum
- OS *: Windows XP, Vista or 7
- Processor: 1 Ghz or faster processor
- Memory: 512 MB RAM
- DirectX: Version 9.0a
- Storage: 500 MB available space
Supported languages (2)
O Rei 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 O Rei?
Steam classifies O Rei as a Free To Play, Indie, Strategy game, developed by Hagane, Lord Erin. Do you want to reign?
Is O Rei free to play?
Yes — Steam lists O Rei as Free to Play.
Is O Rei single-player or multiplayer?
Steam lists these modes for O Rei: Single-player. It lists a single-player mode.
Is O Rei on PlayStation, Xbox, or Switch?
Our data comes from the Steam (PC) store, which lists O Rei for Windows. Console availability isn’t in our Steam-sourced data — check the official site or the console store.
Is O Rei out yet?
Yes — Steam lists a release date of Aug 25, 2019.
What platforms is O Rei on?
O Rei 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 O Rei single-player or multiplayer?
Steam lists these modes: Single-player.
How much does O Rei cost?
It's free to play, per Steam.
Does O Rei have achievements?
Yes — Steam lists 27 achievements for O Rei.
Who made O Rei?
O Rei is developed by Hagane, Lord Erin and published by Hagane.
Where to get O Rei
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, Hagane.