Ratchet & Clank

To activate the cheats, you must have defeated Drek. Then, do one of the needed combos at the 'Goodies' menu to gain the cheats' trigger (i.e make the cheats work):

Big Head Mode for Clank
Flip Back, Hyper-Strike, Comet-Strike, Double Jump, Hyper-Strike, Flip Left, Flip Right, Full Second Crouch

Big Head Mode for Enemies
Stretch Jump, Flip Back (x3), Stretch Jump, Flip Back (x3), Stretch Jump, Flip Back (x3), Full Second Crouch

Big Head Mode for NPCS
Flip left, Flip Right, Flip Back (x3), Comet-strike, Double Jump, Comet-Strike, Hyper-strike

Big Head Mode for NPCS (Alternate method)
Flip left, Flip Right, Flip Back (x2), Comet-strike, Double Jump, Comet-Strike, Hyper-strike

Big Head Mode for Ratchet
Flip Back (X3), Full Second Crouch, Strecth Jump and a Full Second Glide

Invincibility (Lasts 0:30 whenever a blue life ball is collected and only at full health)
Press Comet-Strike[4], Flip Back, Full Second Crouch, Flip Back, Full Second Crouch and Comet-Strike[4]

Mirrored Levels
Press Flip Left[4], 3-Hit Wrench Combo, Hyper Strike, Flip Right[2], Double Jump, Flip Right[2], Double Jump, Full Second Crouch

Mirrored Levels (Alternate Code)
Left Flip (x4), Multi-Strike, Hyper-Strike, Right Flip (x4), Double Jump, Crouch (1+ sec.)

Trippy Contrails (See an effect behind you when during Rail Slides)
Press Wall Jump[10], Double Jump and Hyper-Strike

Inflatable Race-woman
In Blackwater City, go to the woman who asks you if you want to race on the plaza. Then, while facing her, start doing backflips and frontflips and sideflips for a while. You should notice as you do this, her chest inflates to a tremendous size.

 