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.