All PS4 games will be available on the digital PSN Store on Day 1, but the file sizes for these games are really large. PS4 version of Ghosts is estimated to be a 49GB download on the PlayStation store, but we don’t have the exact size yet.
To make the process easier, Sony has confirmed that users will be able to choose whether they want to download the multiplayer portion only first or the campaign portion, so you can play what you want first, and the rest of the game will download in the background.
Call of Duty: Ghosts will be available on Day 1 on the PSN Store. If you own the PS3 version currently, you will be able to upgrade to the PS4 version for $9.99 if your PS3 game box is tagged with the blue sticker.