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

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Revenge! (15) Gamer-Score
Gain the loyalty of the mercenary

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Broke, Blind and Bedlam (15) Gamer-Score
Gain the loyalty of the thief

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Data Hound 10 Gamer-Score
Collect 6 Cerberus data packets scattered across Aite (15)
Digital Exorcist (15) Gamer-Score
Successfully shut down the rogue VI in Project Overlord

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Catching Up (25) Gamer-Score
Reminisce with Liara on the Normandy
Most Dangerous Game (35)Gamer-Score
Defeat the Shadow Brokers Assassin
Detail Orientated (40) Gamer-Score
Use all information terminals in the Shadow Brokers stronghold
Heart of Darkness (50) Gamer-Score
Confront the Shadow Broker
The Hard Way (50) Gamer-Score
Complete the Shadow Broker Mission pack on Hardcore or Insanity

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Covert Action (25) Gamer-Score
Rescue Dr. Amanda Kenson without attracting hostile attention
Last Stand (25) Gamer-Score
Survive all five waves in the battle for Object Rho
The Ultimate Sacrifice (50) Gamer-Score
Complete the Arrival DLC pack