Grand Piece Online is a swashbuckling Roblox RPG inspired by One Piece. You’ve probably heard that exact elevator pitch recited too many times to count. After all, there have been a ton of One Piece RPGs on Roblox over the last couple of years, and at this point, it’s surprising if a blocky RPG focused on sailing the high seas doesn’t contain magical fruit that gives you superpowers.
But GPO can hardly be called derivative considering it was among the first games to reimagine One Piece in Roblox, launching back in 2020. And in the years since, it has grown into a meaty RPG with plenty to sink your teeth into, offering tons of quests to complete, explosive melee battles to win, and powerful fruits to acquire.
Naturally, for a game with so much content, coming in fresh at this point means you’re gonna be doing a lot of grinding early on. But you can save yourself a decent chunk of time by using redeemable codes in-game to earn extra XP for a limited time, temporarily double your chances of getting rare loot drops, and earn race rerolls.
Those rewards are pretty handy, especially as you’ll want to really speed through the game’s early sections so you can face tougher enemies and go on more epic quests. So, to help you do both, we’ve compiled every Grand Piece Online code below:
All Grand Piece Online codes
There are currently no active Grand Piece Online codes. When this changes, we’ll add any new codes we find here.
Expired Grand Piece Online codes
- HAPPYNEWYEARS2026_1
- HAPPYNEWYEARS2026_2
- MERRYCHRISTMAS2025_2
- MERRYCHRISTMAS2025_1
- FREE2XDROP112025
- PHOGIVING20252XDROPS
- PHOGIVING20252XEXP
- HALLOWEENPART32XEXP
- PRESTIGEWORLDENDERGRIND2!!
How to redeem Grand Piece Online codes
If you’re wondering where to punch in your GPO codes, here’s a quick rundown of how to redeem them:
- Launch Grand Piece Online on Roblox, then enter the game.
- Once you’ve spawned, press the M key to pull up the menu.
- Click the button resembling a wooden shop cart to access the shop menu.
- Scroll all the way to the bottom of the shop menu and you’ll spot the codes bar.
- Type your code into this bar (or copy and paste it directly from this page), then hit ENTER to redeem it.
- If your code was valid, you’ll get a notification inside the codes bar.
With that, you’re ready to earn some big XP boosts while sailing the high seas and probably fighting a few clowns with detaching limbs. When you’re all swashbuckled out, be sure to check out some of our other guides. We’ve compiled codes lists for everything from Universal Tower Defense and Type Soul, to Attack On Titan Revolution and Clover Retribution. But if none of those appeal, you can always find our full list of Roblox guides here.