The Turtles had a mass of different games. There is a series of pencil-and-paper Role Playing games, many activity (board)games, and 14 different video games. There are also some color/activity books full of mazes and puzzles, but those are too numerous to count.
There were almost 15 video games. There was to be a Ninja Turtle game published by Playmates for the Sony Playstation that never was released, even though it was scheduled to in a PSX magazine. There has always been hopes that there will be one for the Nintendo64, which seems a more likely canidate then the Playstation.
The video games have some pretty garoooovy (can I use that word?) music. My personal favorite from the Turtle games that I've played is Shredder's Boss theme from TMNT4: Turtles In Time. Music artists have created MIDI files of some of the game music too!