Complete each condition to get the allotted Gamerscore. There is total of 50 achievements.
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Operation Ghost Rider(5) → Finish the 1st mission of the Campaign on Normal, Hard, or Elite difficulty setting

Team Player(10) → Complete a mission on coop mode

Operation Adder(15) → Unlock and finish the 2nd mission of the Campaign on Normal, Hard, or Elite

Operation Cobalt(15) → Unlock and finish the 3rd mission of the Campaign on Normal, Hard, or Elite

Operation Blacklight(15) → Unlock and finish the 4th mission of the Campaign on Normal, Hard, or Elite

OFF certification(15) → Unlock and finish the 5th mission of the Campaign on Normal, Hard, or Elite

Operation Glass Hammer(15) → Unlock and finish the 6th mission of the Campaign on Normal, Hard, or Elite

Operation Backfire(15) → Unlock and finish the 7th mission of the Campaign on Normal, Hard, or Elite

Operation Ulysses(15) → Unlock and finish the 8th mission of the Campaign on Normal, Hard, or Elite

Operation Stiletto(15) → Unlock and finish the 9th mission of the Campaign on Normal, Hard, or Elite

Operation Red Eagle(15) → Unlock and finish the 10th mission of the Campaign on Normal, Hard, or Elite

Operation Torchlight(15) → Unlock and finish the 11th mission of the Campaign on Normal, Hard, or Elite

Operation Iron Arrow(15) → Unlock and finish the 12th mission of the Campaign on Normal, Hard, or Elite

Operation Backhand(15) → Unlock and finish the 14th mission of the Campaign on Normal, Hard, or Elite

Operation Thunderbolt(15) → Unlock and finish the 15th mission of the Campaign on Normal, Hard, or Elite

Operation Wildhorse(15) → Unlock and finish the 16th mission of the Campaign on Normal, Hard, or Elite

Operation Javelin(15) → Unlock and finish the 17th mission of the Campaign on Normal, Hard, or Elite

Operation Twilight(15) → Unlock and finish the 18th mission of the Campaign on Normal, Hard, or Elite

Practice makes perfect(15) → Spend 1 hour flying in Assistance OFF mode

Afterburner(15) → Fly faster than Mach 2 for 1 hour in campaign

Campaign Complete: Normal(30) → Finish the Campaign on Normal

General of the Airforce(50) → Become "General of the Airforce" (level 40)

The hard way(60) → Finish the Campaign on Hard (unlocks achievement for Normal, if not earned)

Extreme challenge(90) → Finish the Campaign on Elite (unlocks achievements for Normal...