here are the seven additional achievments for superman returns the video game for the 360
Warworld (50 points): Visited and dominated Warworld.
Metallo Mastered (100 points): Stopped Metallo in the name of justice.
Me aM savE yOU 100 points): By you is Bizarro not undefeated.
The Mongul Hordes (100 points): Vanquished Mongul once again.
Twisted (100 points): Saved Metropolis from the rampaging tornado.
Versatile Fighter (30 points): Perform 99 fighting combos.
Not That Super (0 points): Entered a cheat code.