Cheat mode:

Select the "Credits" option at the main menu,
then press Circle, R2, Triangle while watching
it. This will enable level selection and the remaining cheat codes.
Begin a game, then save your profile. Then, use one of the following
cheat codes on that profile.

All upgrades:

Select the "Credits" option at the main menu,
then press Circle, Triangle, L1 while watching
it. The "All upgrades" cheat option will now be unlocked.
Invincibility:

Select the "Credits" option at the main menu, then press
Circle, R2, R1 while watching it. The "Invincibility"
cheat option will now be unlocked.

Cheat mode:

The cheat options are unlocked for every 10,000 points scored
in the game. Complete the game to unlock all of the following
cheat options.

Concept Art 1

SGT. Candy Movie

Concept Art 2

Concept Art 3

Slo-motion

All upgrades

Permavision (Unlimited scan vision)

Instant Death

Invincibility

Deathstare (automatically kill anything targeted)