Here is the full list of all 50 Teenage Mutant Ninja Turtles: Mutants in Manhattan achievements.
Use any character at least 50 times
Defeat 10 Stone Warriors with turrets in Wingnut's stage
Complete a stage without being spotted once (outside of Missions)
Transport 10 Chemical Weapons to a Portal
Defeat 5 enemies with 1 drum can
Survive the elevator section at the TCRI building without taking any damage
Obtain all Collectibles
Have Mikey do his co-op move finishing pose during the snapshots when a boss is defeated
Defeat the 4 Krangdroids with your conventional weapons in Mega Krang's stage
Defeat 5 enemies with both Turbo Mode and Berserk activated
Destroy a rampaging car with a drum can
Dismantle Charms 30 times
Eat a pizza during the snapshots when a boss is defeated
Protect 10 Pizza Trucks
Upgrade 30 Charm Effects
Complete Easy or Normal mode
Enter the Pizza Room during the snapshots when a boss is defeated
Traverse a total of 150 miles
Complete a gold bar mission without the carrier being hit even once
Detonate 100 drum cans (including proximity mines)
Find the secret room in the TCRI building
Climb to the highest point in Karai's stage and do a little dance
Eat 100 pizzas
Disarm 30 time bombs
Play online at least once
Experience all of the Krang UFOs' status effects
Complete Hard mode
Obtain 50% of all Collectibles
Destroy a helicopter
Use Turtle Switching to defeat 1 enemy with all 4 Turtles
Hang out outside of an enemy hideout for at least 10 seconds
Have all Turtles turn into zombies simultaneously by touching contaminated water
Destroy 30 cameras and laser devices
Obtain 25% of all Collectibles
Traverse a total of 32 miles
Hit the ceiling switch during the battle with Slash
Traverse 1 mile in the Residential Area without touching the ground
Collect 10,000 Training Points
Defeat a Secret Boss
Use a Combo Attack to defeat 6 enemies at once
Complete the Tutorial
Equip at least one Emblem to your profile
Defeat 5 enemies at once by blowing up a Foot Soldier carrying a bomb bag
Grind rails for 300 feet
Transport gold bars 30 times
Transport 30 bags of money
Transport 30 Krang Bombs to a portal
Protect 30 ATM machines
Have everyone perform a Communication Action during the snapshots when a boss is defeated
Defeat Rocksteady and Bebop by letting them get run over by a train