Pre-ordering Metal Gear Solid V: Ground Zeroes on PlayStation 3 via PSN gives buyers in North America a free premium theme of the game.
On the other hand, the free Metal Gear Solid: Peace Walker HD offer announced earlier is for the European market only. As a reminder: pre-ordering Metal Gear Solid V: Ground Zeroes on PlayStation 3 via the PSN Store will get you the digital version of Peace Walker for free.
The digital PlayStation 3 version of Ground Zeroes costs $20 in the US, and €20 in Europe.
Source: Reddit, via TheSnakeSoup, Su Twitter