To get ultimate sacrifice, you need to be in the losing team and call a nuke, this is a rather hard thing to do, but not impossible. First what you need is good killstreaks, you can use anything from uav to pavelow, chopper gunner, and the nuke. Make your way up to 11 killstreaks then hide where you are certain you wont be found and call your chopper gunner, it shouldn't be too hard to get the 14 remaining kills. Getting so far obviously requires a good amount of camping, the use of a silencer and cold blood would also be a good idea, so other players don't find you while you are controlling your chopper gunner. When your team is about to lose, call the nuke, it will disable the score and your team will win.
Do the challenge "Ultimate Sacrifice" which you unlock be nuking the enemy while you are losing
Complete the Challenge "Ultimate Sacrifice". Call in a nuke while your team is losing.
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Buy it.
Modern warfare reflex and modern warfare are the same. Modern warfare "reflex" means that its for wii. If its just modern warfare its for the other consoles
Go to Headquarters use a riot shield and capture the HQ
Modern Warfare Mobilized(the DS port of Modern Warfare 1) & Modern Warfare 3.
No it is called Modern Warfare Reflex which basically regular Modern Warfare
Modern warfare 3 is better
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.
go in search and destroy, i find is the easiest. but leveling quicker always depends on how good you are.