There are 50 Trophies that can be collected.

Bronze

Dawn of an Era    
Get drafted as a lottery pick in the NBA draft in My Player mode.     

Money Bags    
Purchase 3,000 skill points in a single transaction in My Player mode.    

Check!    
Complete all 3 in-game objectives in My Player mode.     

Come Fly with Me    
Purchase Michael Jordan's dunk package (His Airness) in My Player mode.     

NBA Cares    
Make a donation to the NBA Cares global community outreach initiative in My Player mode.     

My Player of the Game    
Be named Player of the Game (in an NBA game) in My Player mode.     

My Every Day Player    
Become a starter in the NBA in My Player Mode.

My Big Eight-O    
Earn an 80 overall rating in My Player mode.     

My All-Star    
Be named an NBA All-Star in My Player mode.

Buzzer Beater    
Make a game winning shot with no time left on the clock, in a non-simulated game.     

Trip-Dub    
Record a triple double with any player, in a non-simulated game.     

Dub-Dub    
Record two double doubles with any teammates, in a non-simulated game.     

Five by Five    
Record 5 or more in 5 different stats with any player in a non-simulated game.     

It's Raining    
Make 15 or more 3-pointers with any team, in a non-simulated game.     

Block Party    
Record 10 or more blocks with any team, in a non-simulated game.     

Men of Steal    
Record 10 or more steals with any team, in a non-simulated game.     

Swat and Swipe    
Record at least 5 blocks and 5 steals with any team, in a non-simulated game.     

Smothering    
Hold the opposing team's FG% below 40% with any team, in a non-simulated game.     

Giveth and Taketh Away    
Record 10 or more rebounds and assists with any player, in a non-simulated game.     

Hold the Fat Lady    
Start the 4th period losing by 10 or more points and win with any team, in a non-simulated game.     

Wire to Wire    
Do not allow your opponent to lead the game at any point with any team, in a non-simulated game.    

4-Point Line    
Pull off a successful 4-point play with any player, in a non-simulated game.

The Closer    
Hold the opposing team to 0 points in the final two minutes of regulation, in a non-simulated game.     

G Performance    
Score at least 48 points with Kevin Durant to set a new career high, in a non-simulated game.     

A 2K to Call My Own    
Create a My2K Account.     

G Recovery    
Play an entire game using manual substitutions, in a non-simulated game.     

Not Your Father's Association    
Join an Online Association.     

Another Day, Another Win    
Win 5 NBA Today matchups.

Shooting Star    
Win the MVP award in NBA: Creating a Legend mode.     

Sprite Slam Cam    
Get the Sprite Slam Cam replay after a dunk with LeBron James.     

Birthday    
Create-a-Player.     

Hey Mr. DJ    
Create a 2K Beats Playlist.     

This One Counts    
Win one online Versus match.     

Back to Back to Back    
Win 3 Versus matches in a row.

Lincoln    
Win 5 Versus matches total.     

Hamilton    
Win 10 Versus matches total.     

Made My Name    
Complete 5 of the NBA's Greatest challenges.     

Left My Mark    
Complete 10 of the NBA's Greatest challenges.

The Sum of Its Parts    
Play a Team Up Game.     

It's Better to Give    
Share any file type through 2K Share.

Silver

I'm Worth It    
Land a contract that pays at least $10M per season in My Player mode.

G Prime    
End the 1st period with a 15 point lead or greater on the Hall of Fame difficulty setting.

Streaking    
Win 5 games in a row in The Association mode (playing all 5 games).     

Home Court    
Earn the NBA's best record in The Association mode (at least 30 games played).

You're Officially Hot    
Win 5 Versus matches in a row.

Wrote My Legend    
Complete all 15 of the NBA's Greatest challenges.

Gold

Immortality    
Make the Hall of Fame in My Player mode.

Don't Hate the Player    
Win the championship in an Online Association.

Ticker Tape    
Win an NBA Championship in The Association mode (playing every playoff game).

Platinum

The Whole Shebang    
Earn every trophy in NBA 2K12.

http://www.ps3trophies.org/game/nba-2k12/trophies/