One Piece: Unlimited World Red is the best action-adventure game of the One Piece universe. Though there are many video games based on the One Piece franchise, most of them are not good and do not have the production value you would expect for a popular and beloved franchise like One Piece. Maybe that's precisely why, out of the more than 35 games on One Piece, only a few are decent, because most of them are cash grabs.
One Piece: Unlimited World Red is not one of those low-quality games of the series. It is fun and is acceptable. It is not great, but good enough. In other words, it is best that you can get.
This problem of finding good games based on Anime is not unique to One Piece. But with One Piece: Unlimited World Red, the wait for that great One Piece game becomes bearable.