The The Skull of Siren Song Title update for Sea of Thieves has 5 achievements.
Awarded the Commendation 'Seeker of The Siren Song Grade 5'
Awarded the Commendation 'Sentry of the Siren Song Grade 5'
Sink a ship carrying a Siren Song Treasure
Awarded the Commendation 'Savior of the Siren Song Grade 1'
Awarded the Commendation 'Savior of the Siren Song Grade 5'