Resident Evil 2 cheat codes:
To get hunk(4th survivor) and extreme battle where
you can use chris redfield and ada wong:

Complete hard level for both clarie A, B and Leon A, B

To get unlimited ammo at the menu screen where you can equip weapon press the
following strokes:

up, up, down, down, left, right, left, right, aim button.


Hexcheat:
Editing Saved Games:

Item Hex Code Item Hex Code
Free Slot 00 00 00 00 Jewel (Virgin Heart) 33 01 00 00
Knife 01 01 00 00 Weapon Storage (Red) 34 01 00 00
Leon Hand Gun 02 ## 00 00 Card Key
Claire Hand Gun 03 ## 00 00 Hall Electronic Lock 35 01 00 00
Custom Hand Gun 04 ## 00 00 (Blue) Card Key
Magnum 05 ## 00 00 Serpant Stone 36 01 00 00
Custom Magnum 06 ## 00 00 Jaguar Stone 37 01 00 00
Shotgun 07 ## 00 00 Blue Stone (left half 38 01 00 00
Custom Shotgun 08 ## 00 00 of Jaguar Stone)
Grenade Launcher 09 ## 00 00 Blue Stone (right half 39 01 00 00
G. Launcher loaded with 0A ## 00 00 of Jaguar Stone)
Flame Rounds Eagle Stone 3A 01 00 00
G. Launcher loaded with 0B ## 00 00 Bishop Plug 3B 01 00 00
Acid Rounds Rook Plug 3C 01 00 00
Bow Arrows 0C ## 00 00 Knight Plug 3D 01 00 00
Colt SAA (use Hand Gun 0D ## 00 00 King Plug 3E 01 00 00
Bullets) Weapon Box Key 3F 01 00 00
Spark Shot 0E %% 01 00* Detonator 40 01 00 00
0E %% 02 00 Plastic Bomb 41 01 00 00
0E %% 03 00 Bomb and Detonator 42 01 00 00
Sub Machine Gun 0F %% 01 00* (=40+41)
0F %% 02 00 Crank 43 01 00 00
0F %% 03 00 Film A (Code G 44 01 00 00
Flamethrower 10 %% 00 00 Experiment)
Rocket Launcher 11 ## 01 00* Film B (Victim) 45 01 00 00
11 ## 02 00 Film C (T-103) 46 01 00 00
11 ## 03 00 Unicorn Medal 47 01 00 00
Gatling Gun 12 %% 00 00 Eagle Medal 48 01 00 00
Ada Hand Gun 13 ## 00 00 Wolf Medal 49 01 00 00
Hand Gun Bullets 14 ## 00 00 Golden Cog Wheel 4A 01 00 00
Shotgun Shells 15 ## 00 00 Manhole Operner 4B 01 00 00
Magnum Bullets 16 ## 00 00 Main Fuse 4C 01 00 00
Fuel for Flamethrower 17 %% 00 00 Fuse Case 4D 01 00 00
Grenade Rounds 18 ## 00 00 Vaccine 4E 01 00 00
Flame Rounds 19 ## 00 00 Vaccine Container 4F 01 00 00
Acid Rounds 1A ## 00 00 Film D (Secret photo of 50 01 00 00
Sub Machine Gun Bullets 1B %% 00 00 Rebecca)
Spark Shot Bullets 1C %% 00 00 Base Vaccine 51 01 00 00
Bow Gun Bolts 1D ## 00 00 Valve 52 01 00 00
Ink Ribbon 1E ## 00 00 Special (locker) Key 53 01 00 00
Small Key 1F ## 00 00 Joint S Plug 54 01 00 00
Hand Gun Parts 20 01 00 00 Joint N Plug 55 01 00 00
Magnum Parts 21 01 00 00 Cord to connect wires 56 01 00 00
Shotgun Parts 22 01 00 00 Picture of Chris and 57 01 00 00
Health Spray 23 01 00 00 Claire Redfields
Anti Virus Bomb 24 01 00 00 Cabin Key 58 01 00 00
Chemical AC-W2 25 01 00 00 Precinct Key 59 ## 00 00
(converts Grenade (Spade: cyan doors)
Rounds to Acid Rounds) Precinct Key (Diamond: 5A ## 00 00
Green Herb 26 01 00 00 magenta doors)
Red Herb 27 01 00 00 Precinct Key 5B ## 00 00
Blue Herb 28 01 00 00 (Heart: red door)
Mixed Herb (G+G) 29 01 00 00 Precinct Key 5C ## 00 00
Mixed Herb (R+G) 2A 01 00 00 (Club: green doors)
Mixed Herb (R+B) 2B 01 00 00 Control Panel Key 5D 01 00 00
Mixed Herb (G+G+G) 2C 01 00 00 (Down Key)
Mixed Herb (G+G+B) 2D 01 00 00 Control Paney Key 5E 01 00 00
Mixed Herb (R+G+B) 2E 01 00 00 (Up Key)
Lighter 2F 01 00 00 Power Room Key 5F 01 00 00
Lock Pick 30 01 00 00 MO Disk 60 01 00 00
Picture of Sherry and 31 01 00 00 Lab Card Key 61 01 00 00
parents Master Key 62 01 00 00
Valve 32 01 00 00 Platform Key 63 01 00 00

Other useful locations:
Location (hex) - Meaning
0200 — 0201 - Seconds elapsed since start of game
(two-byte binary format, low byte first)
0220 - Number of games saved

The six bytes from 037E to 0383 changes from time to time.
Meaning is still not found...