Client 3.7.3.15 · ~4.1 GB
Download
One package, no installer tricks. Unpack it wherever you like and run the launcher — it keeps itself up to date from then on.
Install
- Unpack the archive to any folder.
- Run
Launcher.atmas administrator. - Register an account, then press Play.
The launcher needs administrator rights because it patches game files in place. Without it, updates fail.
System requirements
| OS | Windows 10 / 11 (64-bit) |
| CPU | Any dual-core from the last decade |
| RAM | 4 GB |
| GPU | DirectX 9 compatible |
| Disk | 6 GB free |
It is a 2000s-era engine — if your machine runs a browser, it runs this.
Trouble starting?
If the client refuses to launch, run
ClientRepairTool.exe
from the game folder. It checks every file against the official
checksum list and re-downloads anything damaged.
Still stuck? Ask on Discord — include what the launcher says.