MustardOS

What is MustardOS?

MustardOS is the community behind muOS, the custom firmware for handheld retro gaming devices.

How do I join MustardOS on Discord?

Click the "Join Server" button at the top of this page, accept the disclaimer, and you'll be redirected to the Discord invite. The link opens directly in Discord if you have it installed; otherwise it opens in your browser and prompts you to install the app.

Is MustardOS free to join?

Yes — MustardOS is completely free to join. Groupsgyani lists user-submitted invite links for Discord servers. We never charge to join, and the server owner has chosen to make this server publicly joinable.

Is MustardOS an active Discord server?

Yes — at our last automated check, the invite link for MustardOS was working. Groupsgyani re-checks every listed server on a rolling schedule and marks dead links as inactive, so the listings you see live on the site are confirmed reachable.

What kind of Discord server is MustardOS?

MustardOS is filed under "Gaming Community" on Groupsgyani. MustardOS is the community behind muOS, the custom firmware for handheld retro gaming devices.

Is it safe to join MustardOS?

Discord servers are user-run communities. Stay alert inside any server — never share OTPs, banking details, KYC documents, or passwords in a chat. Groupsgyani verifies that listed invite links work; we don't vet the people inside the server itself.