A free program for Android, by Namco Bandai Games.

ONE PIECE: Tuna Takes All is the ultimate RPG game for fans of the popular anime series, ONE PIECE. It’s a turn-based RPG wherein you’ll be able to recruit and customize your own crew of pirates, including the main characters from the series, Nami, Zoro, and others. 

You’ll be able to sail the Grand Line with your crew, and battle pirates from other boats as you sail along the Grand Line. You can also battle the various marine forces that you’ll encounter along the way. Download now and have fun!