User blog comment:Callofduty4/New Modern Warfare 3 game modes/@comment-4701156-20111223181918/@comment-62.216.122.196-20111224165116

i think infection could give XP but im not that sure about gun game because ( I HAVENT TRIED IN MW3 ) but if friends get on the enemy side its easy to boost with knife + kill and so on IF it is like it was on black ops.