At the Main menu select 'Extras' and then 'Codes' to enter the following codes to unlock the corresponding effect. These effects can be Toggled On/Off at the Codes screen.

Unlock ABA Ball:
Payrespect

Offensive Awareness:
Inthezone

Deffensive Awareness:
Getstops

Maximum Durability for One Game:
Ironman

Unlimited Stamina for One Game:
Norest

Unlock International All-Star Team:
Tns9roi

Unlock Bobcats Navy Alternates:
Bcb8sta

Unlock Wizards Golden Alternates:
Zw9idla

Unlock Jazz Blue Alternates:
Zjb3lau

Unlock Nets Red Alternates:
Nrd4esj

Topps 2K Sports All-Stars:
Topps2ksports

Unlock Superstar Team:
Rta1spe

Unlock NBA 2k Team:
Bestsim

Select the 'Features' option at the Main menu and then choose 'Codes'. Enter the following codes without the quotes to activate the corresponding effect:

Unlock International All-Star Team
Enter 'tns9roi' as a code.

Unlock Infinite Stamina:
Enter 'norest' as a code.

Unlock Maximum Durability:
Enter 'ironman' as a code.

Unlock +10 Defensive Awareness:
Enter 'getstops' as a code.

Unlock +10 Offensive Awareness:
Enter 'inthezone' as a code.

Unlock NBA 2K Team:
Enter 'bestsim' as a code.

Unlock Superstar Team:
Enter 'rta1spe' as a code.

Unlock Topps NBA 2K7 Team:
Enter 'topps2ksports' as a code.

Unlock ABA Ball:
Enter 'payrespect' as a code.

Unlock Utah Jazz Secondary Road Uniform:
Enter 'zjb3lau' as a code.

Unlock Charlotte Bobcats Secondary Road Uniform:
Enter 'bcb8sta' as a code.

Unlock New Jersey Nets Secondary Road Uniform:
Enter 'nrd4esj' as a code.

Unlock Washington Wizards Secondary Road Uniform:
Enter 'zw9idla' as a code.