Hex Cheat:

1 You must save the game (name:bu00.sav)
2 Use a hex editor
3 In line 00002400 enter this code follow the model:

00002400 00 00 00 00 00 00 00 00 00 00 00 00 07 FA 0F 00

4 You can all codes enter from this line to line 00024F0

CATION: There weapons and tools (from line 0002430 to line 24F0) in the item box 5 If you type FA 0F in row 2,3 your tool and weapon is unlimited but if you type 01 or 02 or.... in row 2 then your tool and weapon is 1 or 2 or .....

01 FA 0F: knife
02 FA 0F: merc's handgun
03 FA 0F: handgun
04 FA 0F: shotgun
05 FA 0F: Magnum
06 FA 0F: G.luncher
07 FA 0F: G.luncher
08 FA 0F: G.luncher
09 FA 0F: G.luncher
0A FA 0F: rocket luncher
0B FA 0F: calting gun
0C FA 0F: min thrower
0D FA 0F: eagle 6.0
0E FA 0F: assault rifle semi
0F FA 0F: assault rifle
10 FA 0F: western gun
11 FA 0F: sigprof
12 FA 0F: m92f e
13 FA 0F: benelli m32se
14 FA 0F: m.thrower e
15 FA 0F: H.gunbullets
16 FA 0F: magnum bullets
17 FA 0F: shotgun ammo
18 FA 0F: G.rounds
19 FA 0F: flame rounds
1A FA 0F: acid rounds
1B FA 0F: freeze rounds
1C FA 0F: M.T.rounds
1D FA 0F: A.R.bullets
1E FA 0F: H.G.bullets
1F FA 0F: S.G.shell
20 FA 0F: F.Aid spray
21 FA 0F: Green Herb
22 FA 0F: blue H
23 FA 0F: Red H
24 FA 0F: mixed
25 FA 0F: mixed
26 FA 0F: mixed
27 FA 0F: mixed
28 FA 0F: mixed
29 FA 0F: mixed
2A FA 0F: F.Aid box
2B FA 0F: crank
2C FA 0F: red coin
2D FA 0F: yellow coin
2E FA 0F: blue coin
2F FA 0F: star card
30 FA 0F: giga oil
31 FA 0F: battry
32 FA 0F: fire hose
33 FA 0F: power cable
34 FA 0F: fuse
35 FA 0F: fire hose
36 FA 0F: oil additive
37 FA 0F: card case
38 FA 0F: stars card
39 FA 0F: machine oil
3A FA 0F: mixed oil
3B FA 0F: iron chain
3C FA 0F: wrench
3D FA 0F: iron pipe
3E FA 0F: botu
3F FA 0F: fire hose
40 FA 0F: tape recorder
41 FA 0F: lighter oil
42 FA 0F: lighter
43 FA 0F: lighter with oil
44 FA 0F: green gem
45 FA 0F: blue gem
46 FA 0F: amber ball
47 FA 0F: obsidian ball
48 FA 0F: crystal ball
49 FA 0F: remote control
4A FA 0F: botu
4B FA 0F: botu
4C FA 0F: gold gear
4D FA 0F: silver gear
4E FA 0F: chronos gear
4F FA 0F: bronze book
50 FA 0F: boronze compass
51 FA 0F: vaccine medium
52 FA 0F: vaccine base
53 FA 0F: botu
54 FA 0F: botu
55 FA 0F: vaccine
56 FA 0F: botu
57 FA 0F: botu
58 FA 0F: medium base
59 FA 0F: eagle part a
5A FA 0F: eagle part b
5B FA 0F: m37 part a
5C FA 0F: m37 part b y
5D FA 0F: botu
5E FA 0F: chronos chain
6F FA 0F: rusted cranck
60 FA 0F: card key
61 FA 0F: gun powder A
62 FA 0F: G.Powder B
63 FA 0F: GP.c GP="Gun Powder"
64 FA 0F: GP.AA
65 FA 0F: Gun Powder BB
66 FA 0F: GP.AC
67 FA 0F: GP.BC
68 FA 0F: GP.CC
69 FA 0F: GP.AAA
6A FA 0F: GP.AAB
6B FA 0F: GP.BBA
6C FA 0F: GP.BBB
6D FA 0F: GP.CCC
6E FA 0F: inf bullets
6F FA 0F: water sample
70 FA 0F: system disk
71 FA 0F: dummy key
72 FA 0F: lockpick
73 FA 0F: warehouse key
74 FA 0F: sickroom key
75 FA 0F: fmblem key
76 FA 0F: botu
77 FA 0F: clock t.key
78 FA 0F: clock t.key
79 FA 0F: chronos key
7A FA 0F: botu
7B FA 0F: park key
7C FA 0F: park key
7D FA 0F: park key
7E FA 0F: facility key
7F FA 0F: facility key
80 FA 0F: boutique key
81 FA 0F: ink ribbon
82 FA 0F: reloading tools
83 FA 0F: game inst a
84 FA 0F: game inst b
85 FA 0F: game instraction a

Hints:

Mercenary mode:

Successfully complete the game one time to unlock mercenary mode and save the "Next Game" file. Start a new game, choose that saved game, then select mercenary mode. This mode involves controlling Carlos, Mikhal, or Nikoli from the train to the starting room with a two minute timer. Killing the various opponents and rescuing civilians during the journey will add more time to the clock. A rank and money will be awarded after the game is completed. The money can be used to purchase better weapons for the next mercenary mode game.

Alternate costumes:

Successfully complete the game under the easy difficulty setting with any rank better than F to unlock Jill's costume from the original Resident Evil and Regina's costume from Dino Crisis. To unlock three additional costumes, successfully complete the game under the hard difficulty setting with a rank of A. This will unlock police miniskirt, disco, and biker costumes.

Epilogues:

Successfully complete the game under the hard difficulty setting to unlock Epilogues. Epilogues are a short diary description of each character in the entire Resident Evil series which describes what happened with that specific person after their adventure. Getting better ratings can unlock the other epilogues. There are eight total Epilogues that can be unlocked.

Enhanced Weapons/Ammo:

You can only create enhanced ammo while playing under the hard difficulty setting. When creating ammo with the reloading tool, save enough gunpowder to mix up the same type of ammo eight times. On the eighth time, the game will prompt "Do you want to create the enhanced ammo?". Select "Yes". This ammo is more powerful, may have slightly different effects, and once loaded into a weapon will change it into an "enhanced weapon". You can only create two types of enhanced ammo: 9mm handgun bullets and shot gun shells. The only different effects the new bullets have is that they are far more powerful.

Fighting Nemesis:

The Nemesis is left-handed and uses that hand to grab you. When fighting him, shoot him two times and run past his right side. Shoot twice and repeat the process. Note: This only works when he does not have his Rocket Launcher and if you are using the handgun.

Destroy Nemesis' Rocket Launcher:

This trick requires a large number of health items and first aid sprays. When you fight the Nemesis with the Rocket Launcher, aim up. If he targets you, run and try to make him waste ammunition. After four to seven shots from him, he will reload, but the rocket launcher will turn red and explode.

Mine Thrower with tracking, enhanced shots:

Either get $9999 in Mercenary mode and buy unlimited ammunition or use the infinite ammo kit obtained from Nemesis on the Mine Thrower. The Mine Thrower will have tracking bullets which will show the directions to the zombies.

Unlimited money and time in mercenaries mode:

Get to the alley that has three dogs and a crate. Kill two of the dogs get on the crate. Continuously dodge the remaining dog for a time and money bonus for dodging