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