what can i do after i finish the singlplayer without the multiplayer there is a challenges or something?

Well, if you look under the Records section, you will see that there are 4 pages of campaign level challenges that you can work on completing by playing the various missions over and over again.

Have you played the entire campaign through in normal, hard, and elite settings? I just did it once through in elite, and that completes the challenges hard and elite at the same time.

You basically play the campaign over and over to gain eXPerience points to increase your rank to open up more planes and weapons packs until you get to level 40 (5 star general of the air force at 1.4 million points)

There are 4 pages of multiplayer team death match challenges.

See the following link and associated links

http://forums.ubi.com/eve/foru...1007546/m/8731094997