Here is the full list of all 40 One Piece Pirate Warriors 3 achievements. It takes around 100-120 hours to unlock all of the achievements on Windows.
Obtained all achievements.
Achieve 100% Legend Points in all episodes.
Complete the entire Gallery.
Complete the "Final Island" in the Dream Log.
Unlock all Characters.
Use Hero Power at least 100 times.
Complete 15 or more islands in the Dream Log.
Complete the Dream Log.
Obtain 20 or more Skills.
Complete five or more islands in the Dream Log.
Complete the Final Chapter of the Legend Log.
Defeat over 10,000 enemies using Kizuna Attacks.
Obtain 100 or more types of Coins.
Increase 20 or more character's Crew LEVEL to MAX.
Complete the Fourth Chapter of the Legend Log.
Unleash a Special Bond Attack with four Crewmates.
Complete the Third Chapter of the Legend Log.
Obtain 50 or more types of Coins.
Complete the Second Chapter of the Legend Log.
Complete 25% or more of the Gallery.
Obtain 20 or more Skill Posters.
Defeat over 10,000 enemies using Special Attacks.
Break through one Character's growth limit.
Defeat over 100,000 enemies.
Achieve 100% Legend Points in a single episode.
Complete the First Chapter of the Legend Log.
Increase one character's Crew LEVEL to MAX.
Defeat 300 enemies using a single Kizuna Rush.
Use Kizuna Attacks of 3 different Crew mates in 1 battle.
Change Crew members for the first time.
Unleash your first Hero Power.
Obtain one Skill.
Get an S-Rank Results Evaluation for a single episode.
Unleash your first Kizuna Rush.
Obtain one Coin.
Obtain one Skill Poster.
Complete the Legend Log Prologue.
Unleash 20 or more Kizuna Attacks in a single battle.
Defeat 1,000 enemies in a single battle.
Unleash your first Kizuna Attack.