Invincibility
As a code input NECROSCI. Note: This will have no effect when you do fall from high places.

Secret Morphs
As a code input LOGGLOGG.

Every Morph
As a code input EUREKA.

Super ending
As a code input BUZZOFF.

Never take damage
As a code input CHEATERBOY.

Every Gadget
As a code input TINKERTOY.

Go anywhere
As a code input BEAMMEUP.

View FMV sequences
As a code input HOTTICKET.

Hints & Tips

Easier Isotopes
Zap the television in Muto's house to get 10 Isotopes.

Aquem: Shortcut
When you are on the Aquem level, there is a waterfall close to the beginning. Walk through it, and you will find yourself at the end of that part of the level.

Junkyard: Health and producer picture
Make your way to the Junkyard ending transloader. There are a few pools of gook. Enable the "Invincibility" or "Never take damage" code. The car in the third pool sinks when you climb on it. Once you get on it and it sinks, turn into a mouse. After the car comes back up, a picture of Bob appears along with a few health bottles. Each one of these is worth five vials. Get the first two. Then jump on Bob to get the last three.

Easier Vials
When you are in the junkyard, zap the dogs and vials will appear. Then, shoot them to receive two more.