Boutique key:
Successfully complete the game one time and wait for the credits to end. You will receive the key to the Boutique on the first street at the start of the game. Use the key to enter and change into an alternate costume.

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.

Hint: The three jewels in the clock tower:
When you enter the room in the clock tower with the three statues holding trays, take the obsidian, crystal, and amber jewels from them. There are three clocks on the wall besides the two dead bodies. Going from left to right, place the amber jewel in the first tray, the obsidian jewel in the middle tray, and the crystal jewel in the third tray. The middle clock will open and you will get a gold gear. Combine it with the silver gear and place it in the slot on the third floor.

Hint: Starting the trolley:
The oil additive needed to start the trolley is located in a locked store room inside the sales office. To unlock it, pick up the flashy remote on a desk to turn on a TV. You will see a commercial about some product from Ubrella Corp. Make note of that product (Safsprin, Adravil, Aquacure, etc.). Go to the nearby computer where Carlos just shot his zombied friend. You will be prompted for a password. Type in the name of the product to unlocked the storeroom.

Hint: Police locker combination:
When entering the Police Station and going into the door in the top left corner you will reach a room with zombies. After killing them, enter the next room, which contains the lockers. Once there, go to the other side to find a locker with a light on it. The game will prompt for a code. The code is "0131", "0513", "4312", or "0114".

Capcom made Resident Evil 3 hard to cheat by making the combinations for the lockers and locations of items in different numbers and locations. Do things differently in each game and you will get a different game each time it is played.
Information in this section was contributed by RESIDENTEVIL321.

Hint: Medical locker combination:
To get the combination to the medical locker in the hospital, go to the room next to that room. Check the dead body in the corner to find one of the following combinations: "513", "101", "498", or "517".

Hint: Grenade launcher:
Use the S.T.A.R.S Card in the computer in the main entrance of the Police Station. When you get the S.T.A.R.S Emblem Key, go to the S.T.A.R.S Office. When you are in the office, go to the big locker next to the out-of-commission message receiver. Open the locker and you will get a Grenade Launcher.

Some people may find the Magnum in the big locker. In this situation, the Grenade Launcher may be found in the Sub-Station.

Hint: Rocket launcher:
In the dead factory, go to the machine next to the water sampler puzzle. Use the facility key where that game states a small plastic card can be inserted. Take the other facility key that is given and go to the steaming room where the small card activated elevator is located .Go down and use the facility key on the door where that game states a small plastic card can be inserted. You will find a rocket launcher with four shots at this location.

Hint: Magnum:
Go directly to the Evidence Room in the Police Station. Go to the number-based lock with the S.T.A.R.S Emblem Key. Use one of the following three passwords: "0131", "4011", or "4312". You will receive the Emblem Key. Go to the locker in the S.T.A.R.S Office. Open the locker to get a Magnum.

Hint: Water combination code:
At the water sample machine near the dead factory, enter "1 Right" for A, "3 Right" for B, and "4 Left" for C. That should unlock half of the lock to the door next to the elevator.

Hint: Music Box code:
One of the codes for the music box in the top or the tower is Down, Up, Up, Down, Down, Up.

Hint: Vaccine medium combination:
One of the combinations when making the vaccine medium in the hospital is 2 and B.

Hint: Run on one foot:
When running, quickly and repeatedly tap Square. Jill will run on one foot, and her other foot will never touch the ground.