Here is the full list of all 50 One Piece Burning Blood achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
All achievements unlocked
Level up a battle character to max
Complete a poster in Rayleigh's Training "Pirate King Training" in WANTED Versus
Earn at least 100,000,000 Beli in total
Complete all Paramount War chapters
Perform a total of at least 5 Unity Clashes
Perform a total of at least 10 Unity Chains
Unlock all support characters
Complete a poster in Rayleigh's Training "New World Training" in WANTED Versus
Complete a poster in the Wanted List "A Queen's Request" in WANTED Versus
Complete a poster in the Wanted List "After Meal Workout" in WANTED Versus
Clear the Paramount War Episode "Ace"
Unlock all battle characters
Unlock over half of the support characters
Clear the Paramount War Episode "Akainu"
Use at least 30 support characters and win the battles
Complete a poster in the Wanted List "Big Eaters" in WANTED Versus
Swapped with partner at least 100 times
Use at least 30 battle characters
Complete 50 wanted posters on the Wanted List in WANTED Versus
Complete a Special Wanted Poster in WANTED Versus
Complete a poster in the Wanted List "Beauty is Strength" in WANTED Versus
Perform a total of at least 30 Ultimate Attacks
Fight an Online Ranked Match
Complete a poster in the Wanted List "The Iron Captain" in WANTED Versus
Unlock over half of the battle characters
Clear the Paramount War Episode "Whitebeard"
Defeat at least 100 opponents
Perform a total of at least 10 Unity Assists
Complete a poster in the Wanted List "Secret of Youth" in WANTED Versus
View 50 different appeal events
Complete a battle in every stage
Complete a poster in the Wanted List "Aiming for Admiral" in WANTED Versus
Earn an emblem
Fight an online Player Match
Earn a title
Complete a poster in the Wanted List "Brave Brigands" in WANTED Versus
Clear the Paramount War Episode "Luffy"
Complete a poster in the Wanted List "Mermaid's Surprise" in WANTED Versus
Add 100 entries to the Keyword Log, then view your Collection
Reach level 5 with any battle character
Perform a Grand Impact for the first time
Unlock a battle character
Unlock all modes
Complete a poster in the Wanted List "Bride's Training" in WANTED Versus
Complete a poster in Rayleigh's Training "Basic Training" in WANTED Versus
Call out your first support character
Unlock your first support character
Level up a battle character
Complete a Paramount War chapter