If you go to Cedar Ridge climb up the mountain behind the Ammu-Nation billboard, uae a vehicle and drive up, you will reach the observatory, a sign will say "No Hidden Package ok chump?"
Go to the Staunton Island church and go to the nearby cinema, if you look up you will see Carl Johnson i blue
You can find a EB Games store in Portland Island (Not a full store). Go to the FIDL store in Portland and go to the roof, a poster on the floor will say " EB Games massive sale!"
When you got to Mr. Benzs clothes shop in either Shoreside Vale or Staunton Island look inside and you will find Tommy Vercetti's casual clothes.
Go to the Belleville park "Thrashin RC". Then when you shoot it, it will keep staying still. If you jump on it, it will activate a Hidden Rampage, which won't count for 100% completion
You can see a memorial for Claude in Portland Island. Go to Hepburn Height s and go to the Construction. Get to the Hidden Package and use a Sanchez or PCJ-600 to ride the way. Keep going till you reach a Unique Stunt. You should land into the memorial it will say " Claude was the drunk fella who pays no bill"
Salvatore has glasses. When playing the mission " The Shoreside Redemption ". The cutscene where he enters, if you have BETA version you will see Black Glasses
The Rockstar sign is hidden in Francis Intl. Airport. Go through the gates and get to the Police Vehicle, use a Sniper and look up in front. A faint R* will be seen