Press Up(2), Down(2), Left, Right, Left, Right, Y, X.
Press Left, Y, Right, X, Down, Y, Up, Down, X, Y, X.
Press Left, Up, Right, Down, Y, X, Y, Up, Right, X.
Unlimited city health:
Press Y, Right, Y, Right,, Up,, Left, Right, Y.
Golden Age Superman costume:
Save Metropolis from the tornadoes.
Complete the following achievements to unlock Xbox Live Gamerscore points.
Hero of Metropolis (200 points): Complete All Metro Events And Mini-Games.
Armageddon Averted (30 points): Complete Level 01: Meteor Storm.
Mr. What's-his-name (50 points): Complete All Mini-Games.
You Am Bizarro! (20 points): Complete The Bizarro Mini-Game.
Super Sonic (20 points): Finished All Fast Flyer Mini-Games.
Mr. Whiskers (50 points): Find All Kittens.
Souped-Up Superman (30 points): Obtain All 15 Power-Ups.
Frequent Flyer (30 points): Travel For 10,000 Miles.
Roadside Assistance (30 points): Pick Up 100 Cars Throughout The Game.
The Greatest Day (30 points): Play A Total Of 12 Hours.
Heavy Lifting (30 points): Lift 10,000 Tons Throughout The Game.
Additionally, there are seven secret achievements, all of which remain unknown at this time.