Last week in Japan was Golden Week, an annual week-long holiday during which sales usually see an increase across the board. This year, however, was a little underwhelming.
Omega Force added the New World, Thriller Bark, and Skypiea arcs to play through and Haki abilities into the game. One Piece: Pirate Warriors 2 also has Pirate's Log mode with an original story where Luffy fights with the Marines.
Luigi’s Mansion: Dark Moon managed to hold on to the #1 spot last week. At #2 was Marvelous AQL's Fate/Extra CCC, which finally saw release following multiple delays.