Level up your Binding of Issac Four Souls Collection with the Big Boi Box. Containing all of the exciting new content of the Requiem expansion in an upgraded and visually stunning collector's storage box, this is a must have expansion for super-fans who already own the original game. The Big Boi box has all the room you will need to safely store all of the components of the base game and expansion- and compatible with both first and second edition copies of the Binding of Isaac: Four Souls.