Teenage Mutant Ninja Turtles: 2003 Edition (PC)
Holiday Outfits: Change your system's date to either December 24th or 25th to see the turtles in Santa garb. Change it to October 31st to wear a pumpkin on your head. Unleash the Secret of Gembu: Beat the third Dojo Stage with all four turtles to learn the Secret of Gembu maneuever. Use the move to damage everyone on the screen. You'll have three opportunities per level to use it. Unlock Challenge Mode: To unlock Challenge Mode, defeat Story Mode with all four turtles. Unlock Characters For Vs. Mode: Fulfill the following criteria to unlock the corresponding characters for Vs. Mode: Casey Jones: Beat Stage 1 with Raphael Evil Turtlebot: Beat Stage 3 with any turtle Hun: Beat Stage 6 with Michaelangelo Splinter: Beat Dojo Stage 3 with Leonardo Shredder: Beat Shredder with any turtle Oroku Saki: Beat Saki with any turtle Yoshi Hamato: Beat Challenge Mode with any turtle Unlock Levels for Story Mode Stage Select: Complete a level to unlock it in Stage Select.