Some TMNT stuff really isn't for little kids.
In the 2014 3DS game, Shredder is sprung from jail by Baxter Stockman. When the Turtles meet up to fight him, they note that there is something strange with the villain. After the fight, they realize that the gas that had filled the room before was a hallucinogen, making the Turtles only think they were fighting Shredder while the real Shredder escaped.
In one of the game's side missions, the Turtles find pages from Karai's diary, indicating that she was only reluctantly going along with Sacks' plans, and that he had initially started out with altruistic goals and had gone corrupt with power. Leonardo notes that Karai is the adopted daughter of Sacks, a.k.a. Shredder.
Shredder fights with blade slashes and teleports. His blades have the potential to poison the player's Turtle. After taking some damage, he will summon four black Turtles with neon clothing and highlights to fight the player. He returns when the black Turtles are beaten, although he does this several times before his life bar empties.
After each time that Shredder is beaten, he seems to transform into a black-and-neon version of a previous boss (Splinter, Rat King, and Slash), which must be beaten before Shredder returns to his primary state and must be beaten again. Once Shredder is beaten after all of the shadow versions of the bosses have also been beaten, does he finally yield.
- Unlike in the final product of the film, Eric Sacks is Shredder in the game, as opposed to being Shredder's adopted son and second-in-command. This is a holdover from an earlier version of the film.
- The black-and-neon Turtles he summons are reminiscent of the ones that appear in Teenage Mutant Ninja Turtles: Dark Horizons