Teenage Mutant Ninja Turtles 1989 Classic Arcade
12 Achievements
200
Xbox 360
Real Ultimate Power
Defeat Shredder in an Xbox Live CO-OP game, and live to tell the tale.
30
How to unlock the Real Ultimate Power achievement in Teenage Mutant Ninja Turtles 1989 Classic Arcade - Definitive Guide
Defeat all 5 of him and you will get this.