Oni

Cheat mode:
Note: This procedure involves editing a game file; create a backup copy of the file before proceeding. Use a hex editor to edit the "persist.dat" file in the game folder. Go to hexadecimal offset $44. Change the $02 or $06 value at that location to $07. Save the file and start the game. Press [F1] to display the diary screen, then enter one of the following codes to activate the corresponding cheat function. Repeat code entry to disable the code.

To enable cheats without a hex editor, type evrything at the diary screen, then activate the codes.
cm555.

Effect	Code
Press [F8] to change characters	shapeshifter
Invincibility	liveforever
One hit kills	touchofdeath
Cannot be knocked down	canttouchthis
Ammunition and health	fatloot
Breakable objects	glassworld
Win level	winlevel
Lose level	loselevel
Super ammunition	superammo
AI controlled characters fight each other	reservoirdogs
Gatling guns mode	roughjustice
Daodan power mode, more damage	chenille
Godzilla mode, become giant	behemoth
Fists Of Legend mode	fistsoflegend
Ultra mode, tougher enemies	killmequick
Slow motion mode	carousel
Big head mode	bighead
Mini mode	minime
Regenerate health	elderrune
Phase cloak	moonshadow
Weapons locker	munitionfrenzy
Enable developer mode	thedayismine

Effect	Code
Cycle through all possible weapons	[F7]
Change character	[F8]
Start recording	[F9]
Stop recording	[F10]
Playback recording	[F11]
Toggle slow motion	[Ctrl] + [Shift] + G
Toggles textures	[Ctrl] + [Shift] + S
Display opponent logic	[Ctrl] + [Shift] + B
Display frame rate	[Crtl] + [Shift] + Y
View console commands	dump_docs
All doors unlocked	door_ignore_locks = 1
Kill all nearby AI	ai2_kill
No clipping mode	chr_nocollision 1
No clipping mode disabled	chr_nocollision 0

Hint: Defeating the Boss after the brain computer:
The Boss after the brain computer has the Wave Motion Cannon. When you start, run at him at an angle and jump kick the gun out of his hands -- he will fall down. Once he is on the ground, run over to the gate with the two fallen guards on each side. Go to the right and pick up the Hypo. Use it, and when you are super charged go after the Boss. This should make quick work of his health. If he has any health remaining, just use combos on him. Note: Do not let him get the gun.

It is easier to defeat the computer if you run counter-clockwise around the room. Just run in a circle since Konoko can move faster than the laser beams.

Hint: Defeating the second Deadly Brain:
On Level 13, hold onto a mercury bow that you get in the stage. Make sure to have some ammunition. When you are fighting Shinitama, go up to Griffan's force field. If he is not standing near the force field, hit one of the switches and return. After he is near the force field, shoot him. If done correctly, he will get hit and come through the force field at you. Simply hit him a few times to win. Note: You cannot get the "Didn't kill Griffan" last Boss battle if this trick is used.
EDeangelus.

Hint: Defeating Barbras:
Knock his gun out of his hands, then pick it up and shoot missiles at him. If you run out of ammunition, let him pick it up and when he charges it up, get it from him again. Note: This will not kill him the second time that you fight him.
Eijinumberone4.

Hint: Defeating Shinatama:
In the Dream Diver level, enable the "Last Man Standing" cheat and rush to the part where you fight the Cloaked Ninjas. If you are quick enough, you will see Shinatama "trying" to fight the Ninjas (or you) and you can kill her. Note: This will not make you lose the level.
Exile Hacker.

Hint: Multiple endings:
After defeating the computer (Shinatama), you are faced with a choice -- kill Commander Griffin or not. Your choice will drastically effect the ending Boss fight. Should you decide to shoot him, you just made things harder on your self. At the final battle you will face your brother after he transforms into a monster. If you do not kill him, the final battle will be slightly easier This time, your brother will approach you with two of his troops and will not transform. Do not worry about the troops, your old "friends" from the TCTF will help you, as well as Commander Griffin, leaving you to face your brother. With either choice, the ending sequence remains the same.
Isaih1313.

Hint: An Innocent Life: Easy robot target:
On level 8, "An Innocent Life", one save point is within a room with three or four robots, deadly green ooze below, and large sparking arcs of electricity that you must avoid to get to the other side. From the save point, run up the stairs and take care of the robot up there. Then, hop down at the outcropping to the Terminal below. You should have just avoided the first half of the first arc of electricity. After you drop down, the robot guarding the terminal to temporarily shut down the arcs of electricity will not usually "see" you, since you arrived the wrong way. He now should be an easy kill.

Hint: Atmospheric Conversion Center (interior): Easier start:
When you begin level 14, attack the enemy which is in front of the pillar that you started out at. He will attack you as well. When he does this, run behind the pillar. This will "bring" his other patrolling friends towards you. This will be slightly easier than running into the open, where a sniper is waiting for you. When all three of the enemies appear, duck and continuously trip them. This strategy works if you disarm the man carrying the gun. Once you have defeated them, look to the left of where you started. There will be an invisibility item. Pick it up and run towards the exit where two guards are located. If you try to kill them, you will probably get shot down by the sniper.
felix del tredici.

Hint: Bio Lab: Force Shield:
On the Bio Lab level, immediately after you defeat the Boss, go to the door to the second save point. After saving the game and you have made it up to the second floor, save the scientist in the back of the left-side room. After doing so, he will give you a Force Shield which will stop all bullets that are shot at you. Note: Even with the shield active, hand to hand combat still can hurt you.

Hint: Dr. Hasagawa's Lab: Big Head mode:
Start level 12, "Dr. Hasagawa's Lab". Reach the part where four tiny strikers rush you. Kill all of them before they escape back into the wall to unlock the ''Big Head'' cheat.

Hint: Regional State Building: Mercury Crossbow:
In the Regional State Building level, shoot out the glass in the starting area and slide through the hole. When you get out, a person with a Mercury Crossbow and plasma rifle should come out from behind the TCTF car. Note: there is another enemy with a Mercury Crossbow on the other side of the building who might start shooting you.
Peter Berman.

Hint: Rooftops: Defeating the ninja:
Use the following trick to easily defeat the ninja at the end of the level. Get and keep the Screaming Cannon. While fighting the ninja, stand with your back to the elevator door that you came through. The ninja will teleport and get stuck in the elevator behind you. Walk forward, turn around, and you will be able to see him trying to run through the door. Shoot him with the Screaming Cannon and he will die instantly. Note: Sometimes he will teleport beside you. If this happens, hit him until he has to teleport and try standing in front of the door again.
Joe B.

Hint: Syndicate Warehouse: Unlimited time:
On the truck section, you will have approximately three minutes to get the console. To have no time, first get to the floor of the console. There will be a striker. Turn the console but do not kill the striker. It will have no time afterwards. Note: If you leave the area by the console and return, you will automatically trigger the intermission sequence and win the level. Also, to keep the striker from killing you, get rid of his gun then run away.
DarkDragon1823.

Hint: Truth And Consequences: Walk outside:
On level 9, "Truth And Consequences" you will start in a small room with a man you can talk to. He will tell you he has a wife and kids. Leave this room and go into the front atrium. In here you will see the locked front door, dual staircases, and a lot of glass. Shoot out a full square pane of glass (not just a triangular section), then run and hop through. You are now outside on the streets. The programmers anticipated this and placed roadblocks outside, as well as invisible barriers, at the end of each street. You cannot run around too much. Note: At each roadblock are two enemies, with at least one carrying a Mercury Bow. If you are fast enough you can see them pop into existence. If you are careful and quick enough, you can grab a Mercury Bow from one of the opponents and it will still have one shot remaining. When you want to reenter the building, run up to the front door and it will open, and lock behind you. If you do not kill any of the opponents that see you while outside, they may come stalking after you throughout the building. Finally, going outside and then reentering the building sometimes causes a glitch in the game where it will stutter every second or so.

Hint: Sliding:
When facing a tough enemy in the later levels, aim fairly high up with a weapon in hand dash to an opponent, slide (begin dashing then press [Shift]), but do not knock the opponent down. While you are sliding, start shooting. This is an easy way to win because it is difficult for the enemy to aim at you.

Hint: Gun special attack:
Equip yourself with a two-handed gun such as the Plasma Rifle and keep it out. While rising from a crouch (press [Shift], then release) press [Kick] and Konoko will do a Jump 360 attack. Note: You can fire while doing this, but aim carefully. Also, this will not work with the Wave Motion Cannon because pressing [Kick] with this gun will launch grenades.
Exile.

Hint: Mukade's tracking fireball:
Enable the munitionfrenzy code. On the left and right of the Wave Motion Cannon, there will be one small dot on each side. One has a WMC logo that does not work and the other has a Mercury Bow logo. Get the Mercury Bow dot. Fire, and it will be the same weapon that Mukade uses. Note: This is almost like the Screaming Cannon; it will hit you if there are no other targets.
DarkDragon1823.

Hint: Faster Mercury Bow recharge:
Instead of waiting for the Mercury Bow to recharge between shots, drop it and pick it up again and it will be ready to fire.
MegaBabe0405.

Glitch: Big head remains:
Enable big head mode and kill someone. Disable it, and the person(s) will still have a big head.
Exile.