Teenage Mutant Ninja Turtles Movies: Classic Timeline
The original Teenage Mutant Ninja Turtles film trilogy defined the franchise for a generation with its practical effects and Jim Henson's Creature Shop bringing the turtles to life. These films balance the darker tone of the original comics with the lighter elements from the popular animated series.
TMNT (2007) is a pseudo-sequel to the 1990s trilogy, set years later with the brothers having drifted apart after fighting Shredder. While its CGI animation style differs dramatically from the three live-action films, director Kevin Munroe included a number of Easter eggs connecting it to the original trilogy.
There are 2 other watch orders available - see the links up above.

Teenage Mutant Ninja Turtles
A quartet of humanoid turtles, trained by their mentor in ninjitsu, must learn to work together to face the menace of Shredder and the Foot Clan.

Teenage Mutant Ninja Turtles II: The Secret of the Ooze
The Turtles and the Shredder battle once again, this time for the last cannister of the ooze that created the Turtles, which Shredder wants to create an army of new mutants.

Teenage Mutant Ninja Turtles III
The four turtles travel back in time to the days of the legendary and deadly samurai in ancient Japan, where they train to perfect the art of becoming one. The turtles also assist a small village in an uprising.

TMNT
After the defeat of their old arch nemesis, The Shredder, the Turtles have grown apart as a family. Struggling to keep them together, their rat sensei, Splinter, becomes worried when strange things begin to brew in New York City.
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