TMNT – code sheet Posted on March 6, 2016 by Steverd TEENAGE MUTANT NINJA TURTLES This game was released by ULTRA games. It was a double disk set with data on the front and back. After the game loads you get this screen to the left. You have to look up the code on a red code sheet, In this case you had to look up the ‘J29’ to progress in the game. HERE is the CODE SHEET in PDF format for you to print out.