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Client package is being prepared for Closed Beta
Join Discord for early access and download announcements. The public client download will be available here soon.
Downloads
Closed Beta
Download & Play
Season 21 client · Closed Beta
Get the ORION client, install once, and connect with your website account.
Client Downloads
Full game client required for first install.
Launcher & Updates
Use the launcher if provided. Otherwise run main.exe from your client folder.
Launcher and patch packages will appear here when available. Use the full client above for now.
System Requirements
| Component | Minimum | Recommended |
|---|---|---|
| OS | Windows 10 64-bit | Windows 11 64-bit |
| CPU | Intel i3 / AMD equivalent | Intel i5 / Ryzen 5 |
| RAM | 4 GB | 8 GB |
| GPU | DirectX 9 compatible · 1 GB VRAM | DirectX 11 · 2 GB VRAM |
| Storage | 5 GB free | 8 GB free |
| Network | Broadband internet | Stable broadband |
MU Online Season 21 client. Administrator rights may be required for first install.
Installation Guide
- Create your accountRegister on the ORION website.
- Download the full clientUse the primary button in the Client Download section above.
- ExtractUnzip to a simple path (e.g. C:\Games\ORIONMU).
- Run the launcherOr main.exe if no launcher is listed.
- Apply patchIf a patch is listed, download and run it before first launch.
- LoginSelect Regular server · use your website credentials.
Detailed guide → Guides → Client Installation
Antivirus & Windows Defender
False positive notice
Private server clients are sometimes flagged as false positives. Add your ORION install folder to your antivirus exclusions before extracting.
Do not download from unofficial sources — use only links on this page.
- Windows Security → Exclusions → Folder
- Disable incomplete-download blocking if extraction fails
Common Issues
Black screen / crash on start
Run as Administrator · disable fullscreen in options · update GPU drivers.
Cannot connect to server
Confirm you use the ORION client from this page · check server status on Home.
Missing DLL (VC++ / DirectX)
Install Visual C++ Redistributable — check Tools download if available.
Version mismatch
Download the latest patch · run launcher update.
Login fails
Use your website account · create one at Register first.
Still stuck?
See Discord Support below.
First login help → Guides → First Login
Need Help?
Closed Beta — support is handled through the official ORION Discord. Staff and community can help with install, connection, and account issues.