Environment

• Native Steam client on Linux (Wayland session)
• Distro: CachyOS (Arch-based), KDE Plasma — not distro-specific (see below)
• Account: Licenses page shows "No licenses found"; purchase history = Dota 2 only

Summary
The right-click menu of the Steam system-tray icon has a "recent games" section listing three titles I have never owned, bought, or launched: RedM, FiveM, Europa Universalis III Demo. They appear only in this tray menu — not in Library, not on Licenses, not in Purchase History, not in account Recent Activity.

The same list also shows "Steam Linux Runtime 3.0 (sniper)", which is a runtime, not a game. Of the five entries, only Dota 2 is legitimate — the rest are a runtime plus three never-owned titles. (Screenshot attached.)

Evidence it is server-side, not local cache

• Closed Steam fully, cleared RecentLocalPlayedGameIDs in userdata/<id>/config/localconfig.vdf.
• After restart the three titles reappear → re-pushed from the server, not stored locally.

Actual activity (contrast)
Only games ever launched on this account (all long uninstalled): Dota 2, DCS World, War Thunder, PAYDAY 2 (per the Steam Help Center). The phantom titles are not among them.

Steps to reproduce

1. Native Steam, fresh Linux install.
2. Right-click the tray icon → observe the games list.
3. Phantom titles present.
4. Close Steam → clear RecentLocalPlayedGameIDs → restart → they return.

Requests

1. Investigate why appids for never-owned games are served for this account, and remove them.
2. On Linux there is no way to remove individual entries from this tray menu or to disable it — please make the list user-controllable or add a disable option.

Notes

• Steam Support ticket HT-3KV4-8G86-V42R was closed without addressing this; support repeatedly redirected here citing unsupported distro, though the issue is account/server-side and distro-independent.
• Searched existing issues before filing; no prior report covers these phantom non-owned entries.