I've just completed the campaign.. well i guess i have, never played the first one, but its where you go into central park, blow up everything, walk into the huge spirral (sorry if you havn't done this part) but yeah i've got every achivement for the levels, but when i come to complete this part it doesn't give me the achivement saying i've completed the game? when i go back to the main menu screen and click 'campaign' instead of 'resume game' it says...
NEW CAMPAIGN
REPLAY MISSION - i highlight over this one
it then goes on to say
Campaign playtime - 15 minutes 23 seconds..?
then all the other information then completed 4.96% then when i actually click replay mission only 3 missions come up?
do i have to complete the whole campaign again? or is it a common thing this happening?

If you want to see all the achivements my xbox live is: dFuzR
i'll upload a sort video showing it all another time
thanks

did you put the auto save feature on if it's not that then something might be cd or another one of the game glitches might have hit you don't worry a update might come out

auto save feature comes on automatically i guess.. and i've not messed about with any settings, CD is fine, no scratches, all the other achivements (multiplayer and singleplayer) are working fine, it just says 4.96% completed when i have most of the achivements for the singleplayer apart from the completing the game ah well a update better come out soon