Ultimate Pirate Piece is an adult 2D adventure with 3DCG animated visuals, built by Masta in RPG Maker. It puts you in the One Piece world after an entity captures you and forces you to live there. You can explore freely, fight pirates and marines, gather swords, build a harem, and pursue your own pirate goals in a fantasy setting with humor.
The current release is v2.5.0, dated October 2, 2026, and the changelog shows ongoing development. It runs on Windows and Mac, is in English, and is uncensored. This update adds Water 7 locations, including Franky House, Galley-La, Ship Upgrade, and Iceberg Office, plus Kiwi and Mozu with three scenes and one hypnosis scene. It also fixes text, marine spawning after Skypiea, recollection bugs, and bounty poster issues, while Patreon adds four extra scenes.
Developer's description
You are captured by some entity and are now forced to live in the world of One Piece!
You are free to explore the world, to fight other pirates and marines, to enslave girls etc...
Become the most fearfull pirate, have an harem, gather swords, do whatever you like, afterall, you are a Pirate!
v2.5.0
Water 7 added
Franky House
Galley-La
Ship Upgrade
Iceberg Office
Kiwi and Mozu added
3 scenes for Kiwi and Mozu
Added 1 hypnosis scenes
Changes
Fixed some text
Fixed a bug of marines not spawning after visiting Skypiea
Fixed a bug in recollection room
Fixed Bounty posters of Miss Valentine and Doublefinger
Fixed intros in recollection room
Patreon
4 new extra scenes
v2.4.0
Long Ring Long Land added
3 minigames
Porche added
5 scenes for Porche
Added 1 hypnosis scenes
Changes
Fixed some text
Fixed Conis recollection
Fixed Raki recollection
Fixed Wyper not appearing
Fixed Gallery bug
Fixed Dialogue repeating in tutorial
Patreon
4 new extra scenes
v2.3.1
Continuation of Celestial Dargon Slave Quest
Nina added (Name can be changed)
Added a Poneglyph in Skypiea
Changes
Fixed some text
Fixed Nojiko sprites
Fixed "King of the world" book
Fixed code in skypiea
Added MacOS version
Patreon
2 new extra scenes
v2.3.0
Added Skypiea
Angel's Island
Upper Yard
Shandora(Goldencity)
Conis added
5 scenes for Conis
Raki added
5 scenes for Raki
Added Conqueror's Haki
the player can evolve their conqueror's haki
Added 2 hypnosis scenes
3 New bosses In Skypiea
Added 1 Clothing scene for Hina
Changes
Fixed some text
Patreon
3 new extra scenes
v2.2.0
Hina added
5 scenes for Hina
Added Jango
8 hypnosis scenes
Changes
Reworked Robin scenes
Fixed some text
Patreon
3 new extra scenes
v2.1.0
Vivi added
5 scenes for Vivi
Drum Island added
1 sword added
Added Gerd
1 scene for Gerd
Added Clothing Store
1 scene for Nami
1 scene for Alvida
Changes
Reworked Nami scenes
Implemented Love/Corruption System for Nami (still in testing)
Added text and scenes depending on Love/Corruption System for Nami
added clothes for mc with the item (disguise)
Patreon
2 new extra scenes
v2.0.0:
Grand Line Added
Added Grand LIne Map
Alabasta
Alubarna
Rainbase
Casino added
Little Garden
Materials island
Cactus Island
Spider's Cafe
Mikita (Miss Valentine) added
5 scenes for Mikita
Zala (Miss DoubleFinger) added
5 scenes for Zala
Cafe Minigame
Changes
XP mutipliers are back to normal
Modified the Custom Menu for better optimization
Enemies updated in Grand Line
Bugfixes
Fixed Alvida scenes where Alvida was named Kaya
Patreon
4 new extra scenes
v1.3.2:
New Event Scenes in LogueTown
- Alvida
- Kaya
Added Mihawk Boss Fight
New sidequest in LogueTown
Changes
New title screen
Added more Marine sprites
Fixes
Improved Menu UI
In case the player is having trouble with the menu added na option in the left side of the ship to change menu
Added na option is Masta keyitem that allows the player to reset the ship
Fixed the lag in many areas
Fixed more npcs misplacement
Patreon
2 new extra scenes
Updated the cheat menu
v1.3.1:
New Event Scenes in LogueTown
Robin
Kaya
Nojiko
Changes
New Menu UI
Added a "load" button aswell
Territory System Implemented
10 territorys to conquer
Added more marines variants
New colors for HP and Haki
Fixes
Fixed multiple scenes stuttering
Fixed recollection room problems
Fixed Marines spawning on land (hopefully)
Fixed some npc misplacement
Fixed Marines Images
Fixed Items not being usable
Patreon
1 new extra scenes
v1.3.0:
New Island LogueTown
Added Alvida
5 new scenes
1 event scene for Nami
1 Boss fight
Sword quest
Alvida recruitable
Small fixes on dialogue
Increased XP
Patreon Version:
Added 3 Extra scenes
Updated the items in cheat menu
v1.2.0:
New Island Arlong Park (Cocoyasi village)
Added Nojiko
4 new scenes
1 event scene for Robin
New devil fruit
New swords
Small event scene
Optimized some Kaya scenes
Fixed a small text that would appear when talking to Robin
Patreon Version:
Added 3 Extra scenes
Updated the items in cheat menu
v1.1.0:
Added Syrup Village
Added Kaya
5 new scenes
1 new sword
Small improvments to HUI
Fixed a Nami Scene
Patreon Version:
Added 3 Extra scenes
Updated the items in cheat menu
--------------------------
v1.0.0
10 scenes
-5 for Nami
-5 for Robin
-3 devil fruits
-2 main islands
Patreon
-3 extra scenes in recolection room (not part of main story)
-cheats
Player reviews
Player rating3.0 / 5 · 6 ratings
Written reviews6 · avg 3.0★
Positive (4–5★)33%
Latest review2026-09-21
What players say
Mixed reviews: players praise world and scenes but cite bugs and slow menus.
5★0
4★2
3★2
2★2
1★0
Players like
Open world and map are praised
Adult scenes are short and visually appealing
Unique conquest and protection mechanics are interesting
Common complaints
Menus, saves, and general bugs disrupt gameplay
Character animations can look glitchy or robotic
Best for players who enjoy One Piece and tolerate bugs
Summarised from 6 written player reviews.
NanairoAppreciation2026-09-21★★★★★
I like the open world and the scenes are short but sweet. I do not like the open ended nature so here are the locations. If you want Robin, check the libraries Nami will be on the port of one…
bloodqueen4202026-06-23★★★★★
Fine game, well made, art is nice and it runs smoothly far as I can tell none of it is ai and it holds up to one piece lore lol The slaves are like whatever, like i have to pay…
geschirt2026-03-15★★★★★
The game currently feels like a buggy mess. Walking and sailing are painfully slow, which makes basic exploration frustrating. Opening the menu can take up to two minutes at times, breaking the flow completely. Some scenes also feature characters with…