Roman5: I would honestly like to see "GOG achivements" Some day here, related to accounts and games
I know that many people are against this here but I guess that's just how I feel in this case
You could always manually add a custom signature to all your messages, something like
Hunky Dweller - Beat Fallout with a charismatic character
and it'd be about as impressive and annoying as the real thing :p
If you want the gameplay immersion breaking thing, build a machine that shoots a laser in your eye and plays a sound when you press a button. Still manual, but almost as annoying as the real thing.