About HDOS
HDOS, or High Detail Old School, is a free-to-use third party client for Old School RuneScape that emulates the era of 2008-2011 RuneScape HD.
How to install HDOS
- Click Download — the developer's official website opens in a new tab.
- Download the latest version there and run it. Choose Custom/Advanced where offered, and skip any bundled extras.
- Prefer the command line? With Flatpak you can install and update it with: flatpak install flathub dev.hdos.HDOS
- Open HDOS once it finishes installing.
Frequently asked questions
Is HDOS free to download?
Yes. The Download button sends you to flathub.org, the developer's official site, where HDOS is available to download. Flatnic doesn't host or modify any files.
How do I install HDOS from the command line?
With Flatpak, run: flatpak install flathub dev.hdos.HDOS. This installs it from the official source and keeps it updated.
Is HDOS safe?
HDOS downloads directly from the developer. As always, scan the installer with your antivirus and choose Custom setup to skip any bundled extras.
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