serial code is required to log in to multiplayer when i clicked on the MP button on the menu of the game, and it pops up a screen saying that the app need to identify my serial code before accessing into multiplayer, and i tried to key in the serial code for several times according to the code provided inside the box of the game disk, but it's not working.

the code provided in the box is XXXX-XXXX-XXXX-XXXX format, but the serial code required of the MP is XXXX-XXXX-XXXX-XXXX-XXXX, which is 5 sets of 4 alphabetic and numbers instead of 4 sets that provided in the cd box.

how can i solve this problem and get my MP serial number?

or it's actually the game itself doesn't come with MP and i have to play more to access the MP content?

the XXXX-XXXX-XXXX-XXXX is for the limited addition unlocks. The XXXX-XXXX-XXXX-XXXX-XXXX is on the back part of the book part. the one with 4 set of digits is just by its self. take the crysis booklet out the one with directions turn it around and Boom There It Is!!! hope this helps bro.