You have to get all of the attachments on the ACR to get the mastery.
Get into a challenge lobby.
challenge lobby
Seatown
Do the challenge "Ultimate Sacrifice" which you unlock be nuking the enemy while you are losing
well call of duty and modern warfare are the same it is called Call of Duty: Modern warfare and then came call of duty: modern warfare 2
Call of Duty 4: Modern Warfare came out first. This is the first game in the Modern Warfare series, and Modern Warfare 3 is the third game in the Modern Warfare series.
i think this is when you destroy certain amounts of the enemies tactical insertions.
You have to complete the Pavelow III challenge, which I believe is call in 25 Pavelows.
Call of Duty Modern Warfare came before Call of Duty Modern Warfare 2
no theres a call of duty modern of warefare 2
Call of Duty 4: Modern Warfare was just before Call of Duty: World At War, and Modern Warfare 2 came just after it. Unless its on the Wii, on the Wii its WaW the Modern Warfare but its called Modern Warfare Reflex
"Call of Duty 6" "MW2" "Modern Warfare"