Full list of all 20 Assassin's Creed Pirates achievements worth 200 gamerscore. It takes around 15-20 hours to unlock all of the achievements on Windows Phone.
Unlock the Riptide
Fully upgrade one ship
Reach Level 10
Complete 10 secondary missions
Find your first treasure
Recruit your first crew member
Complete A Legend is Born
Unlock the Wanderer
Destroy your first enemy ship
Complete 50 secondary missions
Destroy 200 enemy ships
Destroy 1000 enemy ships
Unlock the Fearless
Unlock the Abyss
Reach Level 20
Reach 100% sync on Scorpion Reef
Reach 100% sync on Bahía de Guadiana
Reach 100% sync on Los Mártires
Reach 100% sync on La Habana
Reach 100% sync on Grand Bahama