If I bought battlefild 4 premium, then I need the regular version 4 battlefield.
Just to clarify, Premium does not include the base game Battlefield 4. It is the same system that was used with Premium for Battlefield 3, you will have to buy the base game in order to play the game, be it the Standard Edition or Digital Deluxe Edition. If you would like to expand your gameplay experience over the following year, you can either choose to purchase individual expansion packs or you could purchase Premium which will grant you access to all upcoming expansion packs plus additional perks and bonuses for a lower price in total. You can find all content that comes with Premium listed at the pre-order website: http://www.battlefield.com/battlefield-4/buy/premium-pc
+ FIVE DIGITAL EXPANSION PACKS
+ TWO-WEEK EARLY ACCESS TO ALL FIVE EXPANSION PACKS
+ EXCLUSIVE PERSONALIZATION OPTIONS
+ 12 BONUS BATTLEFIELD 4 BATTLEPACKS
+ SEAMLESSLY TRANSFER PREMIUM MEMBERSHIP FROM XBOX 360 TO XBOX ONE AND PS3 TO PS4
+ AND MORE!