To enable cheat codes you must beat the game once. 
Then, start a new game and press F1 during gameplay
to bring up the diary (after that, type in the 
cheat you want to activate). 


Shapeshifter   - Change character during missions 
                 by pressing the "F8" key
Liveforever    - Infinite Health
Touchofdeath   - Killing enemies with only one shot
Canttouchthis  - Konoko cannot be knocked down
Fatloot        - Gives you all ammo and health
Glassworld     - Allows you to break almost everything
                 in the game
Winlevel       - You win the running scenario
Loselevel      - You lose the running scenario
Bighead        - Big head mode
Minime         - Mini mode
Superammo      - Gives Konoko powerful bullets
Reservoirdogs  - Kumite Mode! (Konoko's Enemies are 
                 fighting eachother)
Roughjustice   - Gatling Guns mode
Chenille       - Konoko becomes stronger
Behemoth       - Jiant mode
Elderrune      - Enables health regeneration
Moonshadow     - Enables cloaking mode
Munitionfrenzy - Creates a pile of weapons
Fistsoflegend  - Fists of legend mode 
Killmequick    - Konoko's enemies are ultra strong and
                 fast to beat
Carousel       - Slow motion mode

(typing in the cheat again from the Diary screen will 
turn that cheat off).