Find Chopper!
Complete Main Mission "Find Chopper!"


Suspicious Woman
Complete Main Mission "Suspicious Woman"


Straw Hats United
Complete Main Mission "Straw Hats United"


The Old Island
Complete Main Mission "The Old Island"


To You
Complete Main Mission "To You"


Radio Hijack
Complete Main Mission "Radio Hijack"


Protect All
Complete Main Mission "Protect All"


Sky Prison, Ho!
Complete Main Mission "Sky Prison, Ho!"


We won!
Complete All Main Missions

First Step
Complete first Side Mission
See: 'Island Hero'.


Island Friend
Complete 20 Side Missions
See: 'Island Hero'.


Island Hero
Complete 100 Side Missions
There are no missable sidequests. If you need extra missions see 'The Navy Fleet sidequest (See: 'Go All The Way To The Top' achievement). Or check if you are missing any treasure map sidequests (See: 'Treasure Hunter' achievement).


Join My Crew!
Attain 100% Karma for one faction
Once you've done all the karma requirements for either the Pro-Navy, or the Anti-Navy you get this achievement.


See You on the High Seas
Reach Pirate Rank 10
See: 'Go All The Way to the Top!'


You've Gotten a Lot Stronger
Reach Pirate Rank 50
See: 'Go All The Way to the Top!'


Go All The Way to the Top!
Reach Pirate Rank 100
For this you have to have every character's Karma requirement at 100%.
I'm only going to note the most frustrating stuff that you might be missing.

They have a random spawn, if you don't see them fast travel away, and back to the location, it might take a dozen tries.
Sakazuki doesn't have a random spawn but can be fought as often as needed in Chapter 16.



This has to be done in chapter 15 or 16. Go to this location and talk to the two citizens to start the quest.


I Want To Get Stronger!
Learn 10 Skills
See: 'I Won't Lose to Anyone!'


This is What I've Been Training For!
Learn 40 Skills
See: 'I Won't Lose to Anyone!'


I Won't Lose to Anyone!
Learn all Skills
If you've beaten the game and you still need to earn xp, you can beat the game again and you will retain all the experience you get which should suffice you to finish upgrading your skills.


Woohoo!
Fly for 5 seconds during a single Gum Gum Rocket flight without landing
If you're having trouble with this you can buy the 'Gum Gum Rocket Flight Increase' skill.


Fly Away
Fly with Gum Gum Rocket for 30 minutes in total
This should come naturally when you're about to be done with the game.


I Love Adventure!
Explore the entire island
You'll earn this as soon as you've uncovered all the fast travel points on the Island.


I Wanna Go to the Sky Islands
Reach a Sky Island for the first time
You'll go to the Sky Islands once you've increased Law's karma. He'll give you a quest called 'Mystery of the Sky Islands'.


Long Journey
Travel a total distance of 50,000 across the island
This comes naturally early on.


Treasure!
Open 15 treasure chests
See: 'Treasure Hunter'.


Treasure Hunter
Open 200 treasure chests

Some of these you have to pick up, go to the location indicated and search for a yellow sparkle. (You have to have finished the 'Treasure Map' sidequest which is a storyline sidequest in Chapter 8).

• Turtle Map: Crystal Canyon East Side. Treasure location: West of Sapphire Town above the beach in the Turtle-like cave.
  
• Dragon Map: Cannon Island all the way North. Treasure location: Crystal Canyon at the top of the crystal structure.
  
• Cloud Map: Aboard the Ship Wreck west of Sapphire Town. Treasure location: Law's Sky Island at the peak.
  
• Waterfall Map: Luffy's Sky Island Northeast next to a chest. Treasure location: Behind the waterfall in Crystal Canyon.
  
• Pond Map: Aboard the Pirate Ship in Ruby Village. Treasure location: The lone rock in the lake in the Graveyard.
  
• Stepping Stones Map: You get this for doing the Ghost in a barrel sidequest (Ruby Village). Treasure location: Sea Prison - Aquamarine next to the bridge.
  
• Boulder Map: Law's Sky Island North. Treasure location: On the mountain/cliff next to the Thousand Sunny.
  
• Ruins Map: For finishing the 'Where's Buggy?' sidequest (You get it in Ruby Village after finding the Stepping Stones treasure). Treasure location: between 2nd and 3rd street Emerald Town.

Exploration Hobbyist
Ask Straw Hat Pirates to go exploring 3 times
See: 'Exploration Strategist'.


Exploration Strategist
Ask Straw Hat Pirates to go exploring 12 times
Talk to Sanji and send one of your crewmates out to explore and gather ingredients. If you don't want to wait real time, you can forward your windows clock.

Big Rookie
Defeat 100 Pirates
Punch all the Pirates!


Wanted
Defeat 200 Sailors
Punch all the Marines (I don't know why they translated this to Sailors)


I'll Take You All On!
Defeat 1,000 Enemies
When you've punched enough enemies you will get this achievement.


Takedown Hobbyist
Defeat 10 enemies with a Takedown
See: 'Takedown Legend'.


Takedown Legend
Defeat 100 enemies with a Takedown
This should come mostly naturally, but buying the 'Consecutive Takedown' skill would benefit you towards this achievement so you can take multiple enemies out with a single takedown.


I'll Send You All Flying!
Defeat 6 enemies simultaneously
It's recommended to use Gum Gum Elephant Gatling Gun since it has a nice spread, jump into a marine base and beat them to a pulp.


Marksman
Perform 10 critical shots
See: 'Sharpshooter'.


Sharpshooter
Perform 100 critical shots
Aim for the head to do a critical shot, you can buy the Ranged Attack Gauge, or Recovery to make this faster.


Evasion Expert
Perform 30 Perfect Dodges
You will need to buy the 'Perfect Dodge' skill and then you have to dodge at the same time as you're about to get hit.


Guard Master
Perform 30 Perfect Guards
You will need to buy the 'Perfect Guard'' skill and then you have to block at the same time as you're about to get hit.

Material Collector
Acquire 100 materials in total
Grab all the sparkles!


I'll Destroy It!
Break 100 objects
Smash all the boxes!


Quartermaster
Create 20 equipment items & outfits
Talk to Franky or Usopp in the Sunny to craft equipment or outfits.


This Could Be Fun
Acquire 25 equipment & outfit plans
You get recipes by opening chests and for finishing sidequests.


Something Smells Good!
Acquire 20 pirate box lunch recipes
You get recipes by opening chests and for finishing sidequests.

Return
Complete Main Mission "The Void Mirror Prototype".


Serious Battle
Use Serious Mode 10 times.
Press D-pad 'Up' to enter Serious Mode, which consumes all of your tension.


Relentless
Perform Relentless 25 times.
Aim at an enemys head and use a special move with LB.


Enthused Warrior
Learn all of Zoro's Skills.
Best way I found to gather exp is to repeat Chapter 6 to 8 around 3 times, you'll get 1300~ xp per run.


Challenger
Complete 3 Challenge Missions with Zoro.
Challenges:

• Button of Admiration - Location: Ruby Village (60 Buttons for 5 stars)
  
• Shodown - Location: Secret Factory (Under 1 minute for 5 stars)
  
• All In - Location: Secret Factory (Under 1 minute for 5 stars)

Master
Complete a Challenge Mission with the highest grade with Zoro.
The description is incorrect. You have to finish all 3 challenge missions with the highest grade.

Mission Complete
Complete all Main Missions in "Where Justice Lies"


Pesky Dodger!
Do 30 Flame-Flame Perfect Dodges
First you have to buy the skill for 25 SP. Then do perfect dodges by hitting circle at the right moment.

Nap time!
Takedown 20 enemies as Sabo
Just get behind enemies and press Square.


Chief of Staff
Learn all of Sabo's Skills
Best way is just to repeat chapter 5 until you max all skills.

New Heights
Clear 4 Challenge Missions as Sabo
See 'Top of the World'.

Top of the World
Get the top Grade as Sabo on 4 Challenge Missions
Challenges:

• Thrillseeker - Start Location: Sapphire Town. | Mari Location: Amber Harbor Mineshaft. (Under 90 seconds for 5 stars)
  
• Battle Test - Start Location: Southwest corner of Steel City | Pacifista Location: Steel City Mineshaft (80 kills for 5 stars)
  
• Pick Master - Start Location: South of Amber Harbor | Picke Location: North of Prison Tower Tourmaline. (Under 1 minute for 5 stars)
  
• Mirror World - Start Location: North of Crystal Cavern. | Iris Location: North of Crystal Cavern. (Under 1 minute for 5 stars)

Adventurous Dawn
Complete all Main Missions in"The Unfinished Map"


Passage Granted
Takedown 20 enemies as Law
Just get behind enemies and press Square.


Taking it Easy
Use Shambles on an Enemy 30 times
Hold RB and teleport into an enemy and attack them 30 times.


Trouble with a capital "D"
Learn all of Law's Skills
Similar to the other DLC's, once you beat the DLC once. Load the 'Cleared Game' save file and beat it again and again until you have all the skills.


Take What's Yours
Clear 2 Challenge Missions as Law
See the below achievement.


The Throne
Get the top Grade as Law on 2 Challenge Missions
Challenges:

• Engraving - Start Location: Amber Harbor. | Honcho Location: Floating Island. (Under 50~ seconds for 5 stars)
  
• Lost on the Floating Islandt - Start Location: West part of the Floating Island (Under 60 seconds for 5 stars)

No Delayed Fights
Complete the "Boss Rush" Challenge Mission
Complete the Boss Rush with any rank to earn this achievement.

Y'all Going Down!
Complete "Boss Rush" with the top Grade
End the Boss Rush with at least 10 bosses defeated.