Download Zu Online
One small launcher installs the game, keeps it up to date and connects you to the server.
Zu Online Launcher for Windows
ZuLauncher.exe · 99 KB · updated 7 Oct 2026 · installs the game (about 3.2 GB)Getting started
- Create an account on the registration page. You log in to the game with the same name and password.
- Download and run the launcher. If Windows SmartScreen says "Windows protected your PC", click More info, then Run anyway: the launcher is new and not yet known to Microsoft.
- Let it install the game. The first time it downloads the full client (about 3.2 GB) into the folder you choose. Later it only fetches what changed.
- Press PLAY, sign in with your account, pick your clan and faction and step into the Secondary World.
System requirements
| Minimum | Recommended | |
|---|---|---|
| System | Windows 7 SP1 | Windows 10 or 11 |
| Processor | Dual core, 2 GHz | Quad core, 3 GHz |
| Memory | 2 GB RAM | 4 GB RAM or more |
| Graphics | DirectX 9.0c, 256 MB | DirectX 9.0c compatible, 1 GB |
| Disk space | 3.2 GB | 3.2 GB on an SSD |
| Other | .NET Framework 4 (already part of Windows 10 and 11) and an internet connection | |
Troubleshooting
The launcher says the server is offline
Check the server status on the home page. During maintenance the servers restart for a few minutes. If the site shows the server online but the launcher does not, allow ZuLauncher.exe through your firewall and try again.
My antivirus or Windows blocks the launcher
The launcher is a new program, so some antivirus tools are cautious about it. It only downloads game files from zu-online.online. Allow it, or add the game folder to the exceptions.
The game opens in a tiny window or the wrong resolution
Start the game from the launcher: it repairs the display settings before every start. You can change the resolution in the game options.
I forgot my password
Write to us from the e-mail address of your account (see Contact) and we will help you get back in.
Something else does not work
Look at the blog for known issues, or contact us with your account name, what you did and a screenshot.