User blog comment:Deathmanstratos/RUMOR: Activision may switch Call of Duty's Lead Platform to PS4/@comment-3964768-20140319202124/@comment-3123696-20140323174914

They didn't. It's a digital download. It's basically a free to play game, but you get to play as just one character like, every month. To unlock the full roster (about 6 characters) you have to pay for each one of them.