Saints Row: The ThirdMore guides, cheats and FAQS
First enter the whatitmeanstome code, and activate it ten to twenty times. You'll reaching Level 50, and gain about $5 million. After that enter the character abilities screen to buy all the fall, fire, bullet, explosion, and vehicle strike damage reduction options until it reaches Never take damage. This will give you complete invincibility from all damage. However you may still die due to a minor glitch if you are in a normal vehicle and run over by a tank or if you crash with an aircraft.