Epic games get an Epic card in the Games tab's launch settings: Epic
sign-in (EOS) on, Launch offline off, Epic overlay on. The choices live
in the game's sidecar and survive an update, so both launch paths read
the same thing - the app before its own launches and droiddeck-store-
launch for one from the Steam client: no code when sign-in is off or
offline, the overlay pointer written or removed per the switch.