Full list of all 63 ONE PIECE World Seeker achievements worth 1,600 gamerscore. It takes around 25-30 hours to unlock all of the achievements in the base game.
The base game contains 43 achievements worth 1,000 Gamerscore, and there are 4 DLC packs containing 20 achievements worth 600 Gamerscore.
Complete Main Mission "Find Chopper!"
Complete Main Mission "Suspicious Woman"
Complete Main Mission "Straw Hats United"
Complete Main Mission "The Old Island"
Complete Main Mission "To You"
Complete Main Mission "Radio Hijack"
Complete Main Mission "Protect All"
Complete Main Mission "Sky Prison, Ho!"
Complete All Main Missions
Complete first Side Mission
Complete 20 Side Missions
Complete 100 Side Missions
Reach Pirate Rank 10
Reach Pirate Rank 50
Reach Pirate Rank 100
Attain 100% Karma for one faction
Learn 10 Skills
Learn 40 Skills
Learn all Skills
Defeat 10 enemies with a Takedown
Defeat 100 enemies with a Takedown
Perform 10 critical shots
Perform 100 critical shots
Perform 30 Perfect Dodges
Perform 30 Perfect Guards
Travel a total distance of 50,000 across the island
Fly with Gum Gum Rocket for 30 minutes in total
Fly for 5 seconds during a single Gum Gum Rocket flight without landing
Break 100 objects
Defeat 100 Pirates
Defeat 200 Sailors
Defeat 1,000 Enemies
Defeat 6 enemies simultaneously
Acquire 100 materials in total
Create 20 equipment items & outfits
Acquire 25 equipment & outfit plans
Acquire 20 pirate box lunch recipes
Ask Straw Hat Pirates to go exploring 3 times
Ask Straw Hat Pirates to go exploring 12 times
Open 15 treasure chests
Open 200 treasure chests
Explore the entire island
Reach a Sky Island for the first time
Complete Main Mission "The Void Mirror Prototype"
Learn all of Zoro's Skills
Perform Relentless 25 times
Use Serious Mode 10 times
Complete 3 Challenge Missions with Zoro
Complete a Challenge Mission with the highest grade with Zoro
Complete all Main Missions in "Where Justice Lies"
Learn all of Sabo's Skills
Takedown 20 enemies as Sabo
Do 30 Flame-Flame Perfect Dodges
Clear 4 Challenge Missions as Sabo
Get the top Grade as Sabo on 4 Challenge Missions
Complete all Main Missions in "The Unfinished Map"
Learn all of Law's Skills
Takedown 20 enemies as Law
Use Shambles on an Enemy 30 times
Clear 2 Challenge Missions as Law
Get the top Grade as Law on 2 Challenge Missions
Complete the "Boss Rush" Challenge Mission
Complete "Boss Rush" with the top Grade