Achievements: Achieve it in Mass Effect 2.
A House Divided (10 points)
Hack a geth collective
Against All Odds (15 points)
Survive suicide mission
Agent (50 points)
Complete 5 missions discovered by scanning unexplored worlds
Battlemaster (10 points)
Gain the loyalty of the krogan
Big Game Hunter (10 points)
Thresher Maw defeated
Brawler (10 points)
Shoot and kill 20 enemies while they're knocked back by a punch
Cat's in the Cradle (10 points)
Gain the loyalty of the Assassin
Catharsis (10 points)
Gain the loyalty of the biotic Convict
Colony Defense (25 points)
Defend a human colony from attack
Doppelganger (10 points)
Help the Justicar resolve her mission
Explorer (10 points)
Visit 100% of the planets in an unexplored cluster
Fade Away (10 points)
Gain the loyalty of Archangel
Fashionista (5 points)
Personalize your armor in your quarters on the Normandy
Friend or Foe (10 points)
Obtain geth technology
Ghost of the Father (10 points)
Gain the loyalty of the Cerberus Operative
Ghost Ship (25 points)
Complete the investigation of a derelict alien vessel
Head Hunter (10 points)
Perform 30 headshot kills with any weapon on humanoid targets
Highly Trained (15 points)
View all advanced combat training videos at Shepard's private terminal.
Incineration Specialist (15 points)
Incinerate the armor of 25 enemies
Insanity (75 points)
Complete the game on the "Insanity" difficulty level without changing the setting
Long Service Medal (75 points)
Complete Mass Effect 2 twice, or complete it once with a character imported from Mass Effect 1
Master at Arms (15 points)
Kill enemies with 5 different heavy weapons during the game
Merciless (10 points)
Make 20 enemies scream as they fall or are set on fire
Missing in Action (5 points)
Save your crew from an overwhelming attack
Mission Accomplished (125 points)
Save humanity throughout the galaxy from certain annihilation
No One Left Behind (75 points)
Keep your team alive through the suicide mission
Operative (15 points)
Complete a mission discovered by scanning an unexplored world
Overload Specialist (15 points)
Disrupt the shields of 25 enemies
Paramour (50 points)
Successfully pursue a relationship with a teammate
Power Full (15 points)
Evolve any power
Power Gamer (10 points)
Reach Level 30 with one character
Prospector (5 points)
Retrieve mineral resources by scanning and probing a planet in the galaxy map
Scholar (15 points)
Unlock 15 new Mass Effect 2 codex entries
Scientist (10 points)
Complete any research project in the Normandy's laboratory
Suicide Mission (50 points)
Use the Omega 4 Relay
Tactician (10 points)
Hit 20 different targets with multiple biotic powers to combine the effects
Technician (15 points)
Obtain 10 technology upgrades
The Archangel (10 points)
Successfully recruit Archangel
The Assassin (10 points)
Successfully recruit the Assassin
The Convict (10 points)
Successfully recruit the biotic Convict
The Cure (10 points)
Gain the loyalty of the Professor
The Justicar (10 points)
Successfully recruit the Justicar
The Krogan (10 points)
Successfully recruit the krogan
The Prodigal (10 points)
Gain the loyalty of the Cerberus Officer
The Professor (10 points)
Successfully recruit the Professor
The Quarian (10 points)
Successfully recruit the quarian
Treason (10 points)
Gain the loyalty of the quarian
Very Elusive (10 points)
Return to active duty
Warp Specialist (15 points)
Warp the barriers of 25 enemies
Weapon Specialist (15 points)
Fully upgrade a weapon