it is a hidden challenge, you get it when you kill 3 enemies with 3 different weapons.
Example: grenade, primary, secondary.
Get into a challenge lobby.
challenge lobby
Seatown
Do the challenge "Ultimate Sacrifice" which you unlock be nuking the enemy while you are losing
You have to get all of the attachments on the ACR to get the mastery.
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 6" "MW2" "Modern Warfare"