He is the father figure to the Turtles, and their teacher as well. A true master of the martial arts.
Splinter makes his debut as an unlockable playable character in 2003 game, appearing after the player has completed Story Mode with all four turtles and has entered the correct code. He is also playable in the game's 2-player Versus mode. Splinter is once again a playable character in Teenage Mutant Ninja Turtles 2: Battle Nexus (unlockable), and TMNT: Mutant Melee (base character). In Mutant Melee, he has his own storyline in which he must personally seek vengeance on the Shredder for his deceased master, Hamato Yoshi.
Splinter is a fully-playable base character, with his appearance from the 2007 movie but voiced by Darren Dunstan. He wields his traditional walking stick and is designed as an "Agile" character with strong fierce attacks and above average jumping ability.