One Piece tower defense aspires me. That may seem like an odd thing to say. This is a licensed game base on an anime, after all. We’re practically scraping the bottom of the proverbial barrel. But it comes to us from Joygame, and they have a good track record with anime games, especially titles based on Shonen Jump hits. It clearly has some money behind it too, but sadly its impressive budget doesn’t seem to have been spent on gameplay.
Every mode also makes use of collectible coins, which offer stat boosts to characters when properly equipped. Coins are gained by killing certain enemies, killing enemies without getting hit, capturing some territories, and opening rare treasure chests. Combining three related coins will cancel out the coins' normal stat boosts and create a team skill that may reduce flinching or increase attack strength when health is low, among other effects.
All that said, when One Piece Online is on, it's on, and part of that comes from its presentation. The game is scored with a lively jazz/rock soundtrack, and while I wouldn't call it memorable, it fits the mood of the game perfectly. Similarly, the cel-shaded characters don't possess the most complex graphics, but they're appealing and well animated, translating unique character designs far better than the anime does. Little touches like the cartoony way enemy soldiers run away with their hands flailing in the air are well appreciated.