Cheat Mode Enable
In order to enable cheat mode in Oni, hex editing must be done. This is an 
intermediate to advanced technique of editing a file. Always make a backup 
before editing any file in this way. 

Open up the "persist.dat" file with your Hex Editor. Go to location 0x44 and 
change the value there to 07. Once that is done, to run the cheat codes press 
[F1] while in the game to open the menu and type in the cheats you want to use.

Also, cheats will be enabled once you win the game (without requiring the above
hex edit). 
Code  Result 
liveforever God Mode 
shapeshifterChange Characters (F8 Key) 
touchofdeathOmnipotence 
canttouchthis     Unstoppable 
fatloot     Ammo plus Health 
glassworld  Glass Furniture 
winlevel    Win Level 
loselevel   Lose Level 
bighead     Big Head Mode 
minimeMini Mode 
superammo   Super Ammo Mode 
reservoirdogs     AIs Fight With Each Other 
roughjusticeGatling Guns Mode 
chenille    Daodan Power Mode 
behemoth    Godzilla Mode 
elderrune   Regeneration 
moonshadow  Phase Cloak 
munitionfrenzy    Weapons Locker Created 
fistsoflegend     Fists of Legend Mode 
killmequick Ultra Mode 
carousel    Slow Motion 
thedayismineDeveloper Mode 


Developer Mode Cheats
Press ` to bring up the command prompt once in Developer Mode.
Then you may type in these cheats: 

Code    Result 
door_ignore_locks = 1     Unlocks All Doors 
ai2_killKills All Nearby AI Units 
chr_nocollision 0 1 No Clipping Mode 
dump_docs     Displays All Command Prompt Docs