Resident Evil

Complete the game as both Chris and Jill one time to unlock the ''One Dangerous Zombie'' option. A special zombie will continue to follow you around during the first part of the game. Shooting this zombie will end the game, so you must avoid it during game play.

Beat the game on normal or hard difficulty on the Once Again mode

Complete the game on 'hard' mode as either jill or chris and rescue the two people within the game for either character.

For Chris: Jill & Rebecca
For Jill: Chris & Barry

Doing so will unlock the 'Real Surviver Mode' which allows you to play the game without the storage box moving (your items will stay in the box you put them in and not move throughout the game) and also there will be no auto aim against enemies (you will have to manually turn to aim at zombies, dogs etc. It is also assumed that you get damaged more in this mode aswell... Goodluck.

Beat the Once Again game in 5 hours or less, and unlock Real Survivor mode, which starts you with manual aiming, an unlimited handgun, and new costumes.

This is the second safest way to kill Zombies using the Knife in my opinion! Simply walk backwards as a Zombie is approaching you and stab its feet (simplest and safest approach) as you retreat. The best method is to stab it once, retreat and do it again. Practice this process regularly and try to incapacitate the Zombies quicker each time. It takes practice, but
perfecting this method will result in far less consumption of ammunition (works wonders in Hard Mode).

Try to avoid using this method in thin halls unless those halls are lengthy!

To get the Rocket Launcher, beat the game in under 3 hours on Normal or Hard mode.

Beat the game in 5 hours or less, and select the Once Again option to start with the Samurai Edge weapon.

To get the Samurai Edge, beat the game in under 5 hours on Normal or Hard mode.

A lot of people who play Resident Evil are not the biggest fans of the One Dangerous Zombie mode! I recommend that you isolate one save-slot for missions with Chris Refield, one save-slot for missions with Jill Valentine and then one save-slot for a file where you have activated this mode (One Dangerous Zombie)! Ultimately, you get a greater variety (seeing as you are not compelled to play a game with this mode activated whenever you load a saved game-file) of gameplay without having to start a new file altogether!

Beat the game on Invisible Enemies mode in 5 hours or less to unlock special bonus features.