Here is the full list of all 26 Sea of Craft achievements.
Complete 1-3
Complete the Prologue
Complete 1-7
Get 30 stars in Chapter 1
Complete 2-7
Get 30 stars in Chapter 2
Complete 2-10
Complete 3-7
Get 30 stars in Chapter 3
Get 90 stars
Player cleared first stronghold
Unlock all Talents in Open Sea
Activate 1 Poseidon Challenge
Activate 3 Poseidon Challenge
Destroy 5 enemy ships in 10s
Get more than 10 kinds of Buff in single Open Sea battle
Alert Level reaches 10
Alert Level reaches 30
Alert Level reaches 50
Complete 1 PVP battle
Complete PVP battle and win the champion
Upload 1 model to Ship Expo
Upload 5 models to Ship Expo
Subscribe 10 models in Ship Expo
Complete all achievements
Find all scattered statues in open sea