More PS2 RAW NTSC codes. Forgot to mention all my games are PS2.
Bullet Time Without Ashley (L2 + Up = On, L2 + Down = Off)
Bullet Time With Ashley (L2 + Left = On, L2 + Right = Off)
And these are the side effects of that code. Bowgun aiming is off. Game acts weird if an enemy grabs you. Leon seems to move a bit slower than usual, but he's still faster than the enemies. Everyone else from mercenaries moves at normal speed. Ashley moves slow. You can't reload, you can try but you'll still have the same amount of ammunition. Basically everything except you moves slower (unless you are Leon).
Alter the Damage for some Weapons
2042DA84 00000800 (it's probably 0042da85 00000008)
I noticed the pistol and TMP and a few other guns had their damage greatly increased so some enemies died in 1 hit, while some guns will have their damage decreased. The automatic sniper rifle had it's damage decreased so you have to shoot a villager about 7 times to kill them.
Only one of these 2 can be active at a time, unless you use a joker command
Have weird stuff appear on the map
Disable a lot of visual effects
You can only have 1 of these below 4 active a time
Can't have your head chopped off
Most Enemies Won't Attack You
Combination of the above 2 codes (untested)
Unarmed Enemies Won't Attack You, Anybody that doesn't Shoot something at you can't kill you, And You can't have your head chopped off
Thermal Goggles View (L1+Left = On, L1 + Right = Off)
You won't need to equip the thermal scope and a rifle now. But turn it on while you are playing, or things won't look correct.
Set how Fast Dropped Items Disappear
The bigger the number, the faster they disappear. All F's make items fade away in less than 3 seconds after they are dropped.
And all the stuff below is extra if you find anything useful.
00 - makes weird stuff appear on the map. In the village when you start the game, a weird black fire appears, a black rectangle appears, and a few blinking dots appear. In Waterworld the map gets a water background, which is pointless but it looks nice.
02 - removes weird map stuff, and safely disables a lot of visual effects. Heads don't explode with blood gushing out of them, the puddle that bodies disappear in doesn't appear, special items like treasure don't blink, fire is invisible, the laser for aiming with guns is gone, the flash grenade doesn't make the screen flash white, the fire doesn't appear from the incendiary grenade, no visual explosions from the hand grenade, no fog, no dust or anything from bullet impact, no electricity or smoke from enemy weapons, your head just falls off without blood or anything when it gets chopped off, anything that you can break (glass windows, boarded up windows, barrels for items) disappears, items don't appear even though they are still there, water becomes a lot darker by losing some extra part of it moving in another direction so it looks dumb, and probably more stuff missing. If you turn this off with a joker, every effect that you didn't see happen will happen at the same time, which is kind of weird to see. Throw out a bunch of grenades, blast the crap out of bunch of things with the chicago typewriter, and break a bunch of things, then turn it off and all the visual effects will happen at the same time.
01 - This might disable a few more visual effects too, but the only thing I noticed was everybody's shadow disappeared.
02 - Your character freezes in place and doesn't take any damage from being grabbed from behind. But you will be stuck in place until somebody hits you. And enemies that are behind you attempt to walk in front of you to attack. When they get in front of you they usually stand still for about 2 seconds before they attack. If they have a weapon they take a couple steps back and stand still for 1 second and then approach you and attack.
04 - exact same as 02.
08 - exact same as 02.
10 - same as 02
20 - You can't have your head chopped off by chainsaws or anything
40 - same as 02
80 - enemies don't attack you, they just step away from you a few steps and stand still. If they attempt to grab you they go through you. But if they swing a weapon at you, you will still be hit. Enemies with bazookas won't shoot you. Enemies with crossbows still shoot you. If an enemy is far enough away from you they will throw their weapon. Enemies still throw dynamite at you. I don't know how many enemies this stops, but it stops Doctor Salvador. It stops the 1st parasite type that swings a sharp bone at you. It stops the big parasite that comes out of the cult guys heads (the one that doesn't come off and looks like a worm thing). It stops the blind prisoner with the parasite on his back that can chop your head off. It might even stop many of the bosses too. It doesn't stop that fat military guy with the chaingun, he will kill you.
ff - enemies without weapons don't attack you, they just walk into you. Doctor Salvador couldn't chop my head off with his chainsaw. Any enemy that is affected by value 80 will knock your health down to 1 in 1-hit, and after that they can't damage you so you can't die. The enemies that aren't affected by value 80 (ones that throw dynamite or shoot arrows at you or whatever else few) are not affected in any way, so they can still kill you.
08, 10, 20, 40, 80 - enemies only attack you from the front. If you are grab from behind, the game acts like you were grabbed from the front.
20 - game stopped when I switched certain weapons.
df - no effect, seems that buggy 20 has to be in the code?
ff - nobody attacked me, they just walked into me. Doctor Salvador will still chop your head off. The game stopped when I switched to certain weapons.
04 - thermal goggles view. Activate it with a joker command while playing or it can act weird. If you turn it on while you are doing anything other than playing and then start playing, enemies won't light up and stuff. And then if you turn it off like that the sky will be dark and everything will look darker and weird for about 5 seconds
10 - Makes many things disappear. The map outline, all your items and your character in the weapons/items box, every enemy and character, probably anything that isn't just a part of the level. When you turn it off everything resumes exactly where it was.
I couldn't jump over a fence in the village, and neither could enemies. That was the only fence I had the chance to try. Pointless.
00 - normal
ff - game zooms in as if you are aiming your weapon.
01, 02 - Ashley isn't present
04 - Ashley is present
08 - Slow Motion + Ashley isn't present + Can't Reload
10, 20, 40, 80 - Ashley isn't present