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Resident Evil (Sega Saturn)

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Title Screen

Resident Evil

Also known as: Bio Hazard (JP)
Developer: Nextech
Publishers: Capcom (JP/US), Sega (EU)
Platform: Sega Saturn
Released in JP: July 25, 1997
Released in US: October 1, 1997
Released in EU: October 1997

RegionIcon.png This game has regional differences.

So very stubbly.
This page is rather stubbly and could use some expansion.
Are you a bad enough dude to rescue this article?
To do:
Compare logo at the end of the credits with PlayStation version.
  • Compare Uncensored Plant 42 Death Animation with PlayStation version (also exclusive to the PC and DS ports) source. Compare for Jill and also other versions/regions of the game. Check also PlayStation 01/31 proto version. Whether this is uncensoring or an improvement remains to be determined.

A port to Sega Saturn of the original PlayStation version of Resident Evil, known as Bio Hazard in Japan. It is the first port the game received, beating the PC version to it by three weeks, and was also released before the Director's Cut re-release on PlayStation. This version adds some exclusive extra content that was never ported to another version (including Battle Game, the precursor mode to the fan favourite The Mercenaries: Operation Mad Jackal), and also has its share of differences with the original release.

Exclusive Content

Battle Game

To do:
Rip Battle Game main and end musics.
You must defeat all the enemies
and enter into the mysterious zone.

This text, in English even in the Japanese version, is the intro to the Battle Game. It is the first Battle mini-game in the series, predating Extreme Battle in Resident Evil 2: DualShock Version and The Mercenaries: Operation Mad Jackal in Resident Evil 3: Nemesis. It is unlocked after finishing the game once, or with the help of a cheat code.

Bio Hazard (Japan)-Battle Stage Clear.png

The Battle Game consists of 15 rooms, including 3 safe rooms. The player must kill all the enemies in a room before the game automatically proceeds to the next room, all while a new up-beat music plays, and is given the liberty to manage his inventory at the start of the game and in safe rooms along the way.
The enemies present in each room and their placement are reminiscent of the rooms' equivalent in the main game but there are differences, such as a zombie Wesker and a golden Tyrant exclusive to this mode. Also, Hunters can be found in the Underground rather than the Ticks from the main game.

Jill Valentine and Chris Redfield are both playable, with or without their alternate costumes. The weaponry and supplies at the disposition of the player differ depending on the character chosen.

After disposing of the golden Tyrant boss, the camera zooms-in and rotates around the protagonist while a new music plays.

Bio Hazard (Japan)-Battle Ranking1.png Bio Hazard (Japan)-Battle Ranking2.png

At the end of the mini-game, the player is given a ranking from J to S and a score depending on time spent, health status, and supplies remaining. Scores can be recorded onto the console's back-up memory or on a memory cart. Each character has his own high score table, achieving an S rank as Chris can prove quite challenging, especially in the international versions of the game.
In the background of the ranking and score screens, a 3D "BIO HAZARD" logo exclusive to this version rotates. The same logo is used after the main game's credit rolls, although the colour differs.



To do:
Rip sounds for Ticks and Hunters, offer comparison.

The Tick is a new enemy which replaces the Hunter in the Underground area, although Hunters are still present in the Mansion. Ticks are very much based on Hunters but differ in several ways: the model looks different, most notably they have a protusion on their backs, their texture is in the brown colour ranges, and they have different sounds. More importantly: Ticks have a new decapitation move.

While Hunters only perform their decapitation move when they're at mid to long range from the protagonist, Ticks do it at close range. This makes the move more likely to be used by the enemy, and it also makes it faster, which makes it harder to dodge. Just like for the Hunters', they will only perform the move if the protagonist has less than half of its maximum HP left.

Zombie Wesker

Bio Hazard (Saturn)-Wesker Zombie.png

A zombified version of Wesker which only appears in the Battle Game exclusive to this version. He has more HP than a regular zombie: it takes 4-5 Magnum Rounds to dispose of him.


Bio Hazard (Japan)-2nd Tyrant.png
In Chris' scenario, a second Tyrant shows up after the player has taken care of the first one. Before it appears, the corpse of the first Tyrant dissolves. It is identical to the first Tyrant.

Bio Hazard (Japan)-golden Tyrant.png
The golden Tyrant is the boss of the Battle Game. It has more HP than the regular Tyrant.

Alternate Costumes

Bio Hazard Saturn-Chris alt costume.gif Bio Hazard Saturn-Jill alt costume.gif

Each protagonist is given a new alternate costume exclusive to this version, on top of the one they already had in the original PlayStation version.
These costumes must be unlocked and are accessible the same way as the others, acting as a reward for acquiring the best endings in each protagonist's scenario. Although, new to this version, a cheat code allows to start a new game wearing them.

Looking at the data of the January 15, 1996 prototype of the original PlayStation game reveals that the developers had intended to make a second alternate costume for each protagonist. Indeed, in the original PlayStation version, there are two triggers to change costume in the dressing room, both of which lead to the same one. Each subsequent port of the game to another system fills this gap with their own costumes.

Cheat Codes

The Saturn version has two cheat codes which allow to use the unlockable exclusive content:

  • To unlock Battle Game: on the title screen, while on the "PRESS START BUTTON" screen, on the second controller hold X+Y+Z and press START. The "Bio Hazard" title call voice should play to confirm that the cheat worked.
  • To use the new alternate costumes when starting a new game: on the second controller hold L+R during the loading time after the intro FMV cutscene.


Zombies Body Parts

PlayStation Saturn (Japan)
Biohazard PlayStation zombiearm.png Biohazard Saturn zombiearm.png
Biohazard PlayStation zombiehead.png Biohazard Saturn zombiehead.png

In the original PlayStation version when the player shoots the arm off a zombie, a puddle of blood appears on the ground, but the arm is missing. Similarly, when Jill kicks a zombie head, the head disappears once it has ended its course. In the prototype versions of the game, both the arm and the head could be seen on the ground: they were taken out for the original PlayStation release but restored in the Saturn version. However it is worth noting that only the Japanese NTSC-J Saturn version has this uncensored, the NTSC-U and PAL releases don't.

Death Scenes

PlayStation, NTSC-J v1.0 Saturn, NTSC-J

In the original PlayStation version, when dying the screen fades to white very quickly, not leaving any time to see how enemies behave. In the Saturn version there is a longer delay before the screen fades to white. All deaths are affected and in the case of zombies, it is possible to see them feast on the corpse of the protagonist, something that could not be seen in the PlayStation version.

In the North American NTSC-U Saturn version, it takes as much time as in the Japanese NTSC-J version before the screen fades to white. However, zombies just stand in place instead of feasting on the corpse of the protagonist.

Plant-42 Kill Scene

PlayStation, NTSC-J v1.0 Saturn, NTSC-J

In the Saturn version, the kill scene of Plant-42 lasts longer. Chris's lower body part first falls to the ground, then his upper body does. In the original PlayStation version, neither body part falls down.

Graphical Differences

Background Differences

Dormitory B1

PlayStation Saturn
Bio Hazard PlayStation sharkbg1.png Bio Hazard Saturn sharkbg1.png

The sign next to the storeroom door was changed to "ARMS" in the Saturn version.

PlayStation Saturn
Bio Hazard PlayStation sharkbg2.png Bio Hazard Saturn sharkbg2.png

In the next room, the sign next to the switch is gone in the Saturn version and the cabinet on the left is opened.

Laboratory B4

PlayStation Saturn
Bio Hazard (PlayStation)-Lab1.png Bio Hazard (Saturn)-Lab1.png
Bio Hazard (PlayStation)-Lab2.png Bio Hazard (Saturn)-Lab2.png
Bio Hazard (PlayStation)-Lab3.png Bio Hazard (Saturn)-Lab3.png
Bio Hazard (PlayStation)-Lab4.png Bio Hazard (Saturn)-Lab4.png
Bio Hazard (PlayStation)-Lab5.png Bio Hazard (Saturn)-Lab5.png
Bio Hazard (PlayStation)-Lab6.png Bio Hazard (Saturn)-Lab6.png
Bio Hazard (PlayStation)-Lab7.png Bio Hazard (Saturn)-Lab7.png
Bio Hazard (PlayStation)-Lab8.png Bio Hazard (Saturn)-Lab8.png

In the Saturn version:

  • There is a second container in the back of the room, a second Tyrant comes out of it in Chris' scenario.
  • The vats in the middle of the room are broken, most likely done to bypass the Saturn's inability to render translucent objects. The vats also have extra detailing on their bottom and upper parts.
  • Many of the machineries along the room look different, including the computer next to the Tyrant's container.
  • The lighting differs, including inside Tyrant's container.
  • Other detailing differ, like the number and size of the metallic slabs on some of the walls.


PlayStation Saturn
Bio Hazard (PlayStation)-Crows.png Bio Hazard (Saturn)-Crows.png

In the PlayStation version, only certain parts of the crow enemy is textured, while in the Saturn version its entire body is. The crow is the only enemy which looks did not change between the August 4, 1995 prototype and the final PlayStation versions.

Other Differences

Visible Items

PlayStation Saturn
Bio Hazard (PlayStation)-invisiblecrest.png Bio Hazard (Saturn)-visiblecrest.png
Bio Hazard (PlayStation)-invisiblekey1.png Bio Hazard (Saturn)-visiblekey1.png
Bio Hazard (PlayStation)-invisiblekey2.png Bio Hazard (Saturn)-visiblekey2.png
Bio Hazard (PlayStation)-invisiblekey3.png Bio Hazard (Saturn)-visiblekey3.png

The Sun Crest, the Small Key located in the shed, Dormitory room key 003 and the Small Key located in the basement of the Dormitory are all invisible in the PlayStation version but visible in the Saturn version. Looking at the data of the PlayStation version reveals that the textures of those items' 3D models are present in the rooms' data, which means that they were intended to be visible (as a counter example no texture data exists for the Ink Ribbon and the ammunition hidden in the small 2F east office).

Rebecca's Inventory

In the PlayStation version, when Rebecca Chambers is playable in the Dormitory, items that were picked up when playing as her in the Mansion are still in her inventory. In the Saturn version, except for the Beretta, her inventory is empty at that point. Presumably this was changed to un-clutter her inventory for the V-Jolt puzzle which requires picking up at least 3 items. However, a glitch allows to retrieve some of her lost items.


When comparing the Japanese PlayStation and Saturn versions: two of the three gameplay demos which play when waiting at the title screen differ slightly.