There is another accelerator included in the Showcase Season Pass, but if you don't want the rest of the pass, this $1.99 version gives you access to all of the game's unlockable content. Only buy this if you can't be bothered to trail your way through the numerous Showcase modes and My Career mode. All items are available to be unlocked as you make your way through each of those modes by completing certain tasks in matches. Please don't be confused. The downloadable content, such as Paige, isn't available in this price.
