how does the weapon achivments works

[VFDarkSlayer]

me and a buddy play the game and i get 50 kills and he get 50 kills 2 get the 100 sniper kills? or does it count individual 100 kills each in sniper or what.?

[verytallmidget]

dude of course it has to be YOU getting the 100 kills....or else it would specify otherwise

[VFDarkSlayer]

what is it best to play with a friend first or play single player first.?

[verytallmidget]

there is no "single player" or "co-op" mode...its the same story no matter which way you play it....if your playing alone...the AI will be your partner...if your playing with a friend...its the same story except no dumb computer AI

[VFDarkSlayer]

ok. =) i mean 1st play shuold i play it alone first with ai or with a partner.? i heard back to back achive u can only get that in sinle player not multi.? it is correct or?