Mass Effect 2 Cheats

Ghost Ship (Bronze): Complete the investigation of a derelict alien vessel
Head Hunter (Bronze): Perform 30 headshot kills with any weapon on humanoid targets
Heart of Darkness (Silver): Confront the Shadow Broker
Highly Trained (Bronze): View all advanced combat training videos at Shepard's private terminal.
Incineration Specialist (Bronze): Incinerate the armor of 25 enemies
Insanity (Gold): Complete the game in the 'Insanity' difficulty level without changing the setting
Long Service Medal (Silver): Complete Mass Effect 2 twice, or experience the interactive backstory (Cerberus Pack downloadable content) and complete Mass Effect 2
Master at Arms (Bronze): Kill enemies with 5 different heavy weapons during the game
Merciless (Bronze): Make 20 enemies scream as they fall or are set on fire
Missing in Action (Bronze): Save your crew from an overwhelming attack
Mission Accomplished (Silver): Save humanity throughout the galaxy from certain annihilation
N7 Elite (Platinum): Acquire all trophies
No One Left Behind (Gold): Keep your team alive through the suicide mission
Operative (Bronze): Complete a mission discovered by scanning an unexplored world
Overload Specialist (Bronze): Disrupt the shields of 25 enemies
Paramour (Silver): Successfully pursue a relationship with a teammate
Power Full (Bronze): Evolve any power
Power Gamer (Silver): Reach Level 30 with one character
Prospector (Bronze): Retrieve mineral resources by scanning and probing a planet in the galaxy map
Scholar (Bronze): Unlock 15 new Mass Effect 2 codex entries
Scientist (Bronze): Complete any research project in the Normandy's laboratory
Suicide Mission (Bronze): Use the Omega 4 Relay
Tactician (Bronze): Hit 20 different targets with multiple biotic powers to combine the effects
Technician (Bronze): Obtain 10 technology upgrades
The Archangel (Bronze): Successfully recruit Archangel
The Assassin (Bronze): Successfully recruit the Assassin
The Convict (Bronze): Successfully recruit the biotic Convict
The Cure (Bronze): Gain the loyalty of the Professor
The Justicar (Bronze): Successfully recruit the Justicar
The Krogan (Bronze): Successfully recruit the Krogan
The Prodigal (Bronze): Gain the loyalty of the Cerberus Officer
The Professor (Bronze): Successfully recruit the Professor
The Quarian (Bronze): Successfully recruit the Quarian
Treason (Bronze): Gain the loyalty of the quarian
Very Elusive (Bronze): Return to active duty
Warp Specialist (Bronze): Warp the barriers of 25 enemies
Weapon Specialist (Bronze): Fully upgrade a weapon

Arrival DLC Trophies
There are only 3 Bronze Trophies.

Covert Action (Bronze): Rescue Dr. Amanda Kenson without attracting hostile attention.
Last Stand (Bronze): Complete all 5 waves in the battle for Object Roh.
Ultimate Sacrifice (Bronze): Complete the Arrival DLC.

New Game+
To unlock New Game+, clear the Suicide Mission/watch the credits, then start a new game and select the "Import ME2 Character" option, and select the save file you cleared the Suicide mission on. In New Game+ your current Level, Class, Skills, Weapons Training, and Equipment from your previous save file will be carried over to the new file. in addition, you also gain 50,000 of each resource and a 200,000 Credit Bonus. (NOTE: Upgrades do not carry over and your Karma/Squad Loyalty is reset in New Game+)

New Game+: Clear Suicide Mission

Unlimited Squad Points
You must have "Dominate" as a bonus power then, Go to the research terminal and choose "Retrain Powers" to reset your squad points, then choose "Advanced Combat Research" and select "Dominate." You will now have 1 free point invested in "Dominate." Now "Retrain Powers " again, and repeat. Each time you will get 1 extra squad point to invest. Costs 7500 element zero per use.