Accomplish the indicated achievement to get the corresponding number of Gamerscore points:

Access Denied (10 points): Prevent Roxxon from stealing the Stark Archives.
Deportation (15 points): Prevent the Russian separatists from deploying Roxxon Armigers.
Power Outage (15 points): Defeat the Crimson Dynamo.
Anti-PROTEAN (20 points): Destroy Project PROTEAN.
Improvisation Under Fire (20 points): Save Rhodey and the Stark mobile armory from the A.I.M. attack.
Operation Daybreak (20 points): Defeat A.I.M. and save the S.H.I.E.L.D. Helicarrier.
Stormbreaker (20 points): Shut down the GREENGRID power transmitter.
The Bigger They Are (30 points): Defeat ULTIMO.
Shake It Off (3 points): Recover from the Roxxon EMP attack.
Not In My House (15 points): Prevent the first wave of Roxxon dropships from deploying their drones.
Full Flight (15 points): Only one S.H.I.E.L.D. transport lost in the canyon run.
Area Secured (20 points): At least 10 S.H.I.E.L.D. units survive the battle for the docks.
Pulling The Plug (15 points): Destroy all four Tesla reactor stabilizers in under 60 seconds.
Anger Management (15 points): Destroy most of the structures in Shatalov's base.
Entrapment (15 points): Reach the bottom of the elevator shaft without touching a laser tripline.
Defensive Player Of The Year (20 points): Save all four repulsor lifts and all four stabilizers on the S.H.I.E.L.D. Helicarrier.
Brute Force (30 points): Destroy the A.I.M. Arc Armiger without using missile deflection.
Guardian (25 points): Shut down GREENGRID without needing to repair the Arc Armiger.
Switchboard Operator (20 points): Reposition all of the GREENGRID relays without being interrupted.
Not A Scratch (40 points): Defeat ULTIMO with no armor damage.
Ultimatum (15 points): Complete every mission on Easy difficulty.
Iron Man (30 points): Complete every mission on Normal difficulty.
Invincible (100 points): Complete every mission on Formidable difficulty.
Fists Of Iron (20 points): Defeat 100 enemies in close combat.
Storm Of Lead (20 points): Defeat 100 enemies with War Machine's minigun.
Fire And Forget (10 points): Defeat 100 enemies with homing missiles.
Subtle Like A Rocket (15 points): Defeat 100 enemies with the rocket launcher.
Room Broom (20 points): Defeat 100 enemies with War Machine's shotgun.
Extra Crispy (20 points): Defeat 100 enemies with Iron Man's laser.
Pushback (20 points): Defeat 100 enemies with Iron Man's repulsor.
Up Close And Personal (20 points): Defeat 100 enemies with Iron Man's blaster.
Overkill (25 points): Defeat 100 enemies with Iron Man's unibeam.
Hall Of Armors (35 points): Unlock all armor suits.
Technical Genius (50 points): Invent every module, ammunition, and weapon upgrade.
Gonna Need Some More Bad Guys (30 points): Defeat more than 1,000 enemies.
Unnecessary Force (7 points): Defeat a soldier with Iron Man's unibeam.
Bulletproof (30 points): Defeat 50 enemies in melee as Iron Man while Invincible.
Ultimate Iron Man (10 points): Unlock the Ultimate Iron Man armor.
Classic Iron Man (10 points): Unlock the Classic Iron Man armor.
Classic Mark I (10 points): Unlock the Classic Mark I Iron Man armor.
Extremis (10 points): Unlock the Extremis Iron Man armor.
Mark III (10 points): Unlock the Mark III Iron Man armor.
Mark II (10 points): Unlock the Mark II Iron Man armor.
Mark VI (10 points): Unlock the Mark VI Iron Man armor.
Silver Centurion (10 points): Unlock the Silver Centurion armor.
Two Man Army (10 points): Defeat the Russian separatists as both Iron Man and War Machine.
It Takes Two To Tangle (10 points): Defeat Crimson Dynamo as both Iron Man and War Machine.
Man And Machine (10 points): Destroy Project PROTEAN as both Iron Man and War Machine.
Bipolar (10 points): Shut down the GREENGRID power transmitter as both Iron Man and War Machine.
Omega Man (30 points): Defeat 100 enemies as War Machine while using the Omega System.