YouGotHitByGunner said:They most likely will still show up. Hiding games in your library won't affect what trackers have already registered on the tracker.
Edit: Also good to note that hiding a game in your library won't actually remove it from your owned games. Trackers get your achievement progress from owned games.
Can confirm, hid most of the puzzle games I've completed after finishing them, but they still appear in my perfect games list & TSA profile.