The The Seabound Soul Title update for Sea of Thieves has 8 achievements worth 75 gamerscore.
Sell all 5 Tomes of Curses.
Sell the Tome of Curses I.
Sell the Tome of Curses II.
Sell the Tome of Curses V.
Sell the Tome of Curses III.
Sell the Tome of Curses IV.
Complete The Seabound Soul
Complete all commendations for The Seabound Soul