Here is the full list of all 50 Teenage Mutant Ninja Turtles: Mutants in Manhattan achievements worth 1,000 gamerscore.
Transported gold bars 30 times
Protected 30 ATM machines
Transported 30 bags of money
Used any character at least 50 times
Obtained all Collectibles
Completed a stage without being spotted once (outside of Missions)
Transported 10 Chemical Weapons to a Portal
Transported 30 Krang Bombs to a portal
Protected 10 Pizza Trucks
Defeated 5 enemies with both Turbo Mode and Berserk activated
Obtained 50% of all Collectibles
Defeated 10 Stone Warriors with turrets in Wingnut's stage
Defeated the 4 Krangdroids with your conventional weapons in Mega Krang's stage
Disarmed 30 time bombs
Hung out outside of an enemy hideout for at least 10 seconds
Ate 100 pizzas
Ate a pizza during the snapshots when a boss is defeated
Dismantled Charms 30 times
Upgraded 30 Charm Effects
Traversed a total of 150 miles
Defeated 5 enemies with 1 drum can
Watched Mikey do his co-op move finishing pose during the snapshots when a boss is defeated
Destroyed 30 cameras and laser devices
Detonated 100 drum cans (including proximity mines)
Destroyed a helicopter
Obtained 25% of all Collectibles
Destroyed a rampaging car with a drum can
Survived the elevator section at the TCRI building without taking any damage
Defeated Rocksteady and Bebop by letting them get run over by a train
Made everyone perform a Communication Action during the snapshots when a boss is defeated
Completed a gold bar mission without the carrier being hit even once
Completed Hard mode
Found the secret room in the TCRI building
Defeated 5 enemies at once by blowing up a Foot Soldier carrying a bomb bag
Completed Easy or Normal mode
Entered the Pizza Room during the snapshots when a boss is defeated
Defeated a Secret Boss
Experienced all of the Krang UFOs' status effects
Played online at least once
Activated the ceiling switch during the battle with Slash
Traversed a total of 32 miles
Turned all Turtles turn into zombies simultaneously by touching contaminated water
Used a Combo Attack to defeat 6 enemies at once
Climbed to the highest point in Karai's stage and did a little dance
Collected 10,000 Training Points
Used Turtle Switching to defeat 1 enemy with all 4 Turtles
Traversed 1 mile in the Residential Area without touching the ground
Equipped at least one Emblem to your profile
Completed the Tutorial
Grinded rails for 300 feet