Bosses include super shredder, krang, Toka and Razor slash leattherhead and other notorious villians from the comic book and tv show

The game starts when the turtles are vacationing on a beach, the evil Shredder comes and steals Manhattan Island

Plus, one of the plot twists is that Shredder introduces Toka and Rezor before turning into Super Shredder for the final battle

Fight it out to save April then go to defeat Krang and the Shredder

TMNT has a main objective (return Master Splinter to his human form by stealing Shredder's mutantgeon gun); TMNT II does'nt have a main objective, but TMNT III has a true objective.

Rocksteady, Bebop, and Krang return stronger and deadlier than ever and you must fight Shredder twice (the second time is on the final level, as Super Shredder).

Then you must fight off more of Shredder's mutants, chase Shredder to Krang's ship, defeat Krang and Super Shredder and return Manhattan Island to the ground.