Resident Evil 1

Resident Evil 1 Jill Good Ending Requirement:
Wait for Barry after he drops the first rope. (This will grant you the numeric keypad door pass code)
Go first in the caves.
Save Chris.

Resident Evil 1 Chris Good Ending Requirement: 
When Rebecca asks to come with you, say yes.
Rescue Jill.

Password For The Lab Computer Lock:

In the Dormatory, in the room with the beehive, there is a door with a Electronic key-pad used to unlock it.
Here are the codes:
Jill Valentine: 3,4,5
Chris Redfield: 2,1,5
You can use the following passwords for unlocking the doors on the Lab computer:
Login: John
Password: Ada
B2 Door Verification Password: Mole

One Shot One Kill Zombie With Shotgun:
To kill Zombies in one shot, let them walk right in front of you. Then aim high with the Shotgun and fire. Poof! Dead zombies. 

Lower The Game Play Difficulties Level:
1) Immediately when you get to the dining room at the beginning of the game, exit back to the main hall, and Wesker will say "Investigate if you hear any gunfire", and you'll go back to the dining room.
2) Once in the dining room, try to exit again, and this time Barry will say "Lost your courage already? It's not like you!", and you won't be able to exit again.
3) Now go talk to Barry as you normally would.
4) After talking to Barry, head to the grandfather clock and before you can get near it, a zombie will come out of a door and chase after you, Barry will say a pretty ridiculous line, and then reduce its head to a gory pool of blood and brain chunks.
5) After this hilarious sequence, you'll have to go report it to Wesker back in the main hall, but unfortunately, he's gone.
6) Go around the back of the stairs looking for Wesker and when you come out the other side, Barry will talk to you a bit and give you the lockpick.
7) After Barry leaves, go back to the dining room, and in through the door the zombie came out of, turn left, then right and you found your old buddy's (Kenneth's) mutilated body, only this time more mutilated, without his legs (or ammo clips), which will confirm that the code worked.


Tips Fighting Plant 42:
When fighting plant 42 you have to keep moving. If you do not some sort of acid will fall on your head and hurt you. The best strategy to beat it is shoot two or three times then run in a circle and repeat until plant 42 dies. You can use handgun here, waste all the handgun bullets here cause after this you will go back to mansion, hunters will appear, handgun become useless (try it, it will cut your head off before you finish up your clip....), you will using shotgun at least from now on, that's why you shouldn't use any of your shotgun and bazooka early in the game, cause handgun will be more then enough to beat zombies and dogs. Hunters will take 3-4 shots of shotgun to pin it down..... 

Unlimited Rocket Launcher!
To get the rocket launcher, you need to beat the game in under three hours. It will ask you if you want to play again. Answer yes and you'll receive the rocket launcher with unlimited ammo!

Fighting Snake First Time:
The first time you fight the snake you don't actually have to kill it. Wait until it's about to strike and run, then grab the moon crest and run away. If you're too late the snake will trap and probably kill you.

Getting The Star Crest: 
Go to the hall with the numerous paintings and crows.Put the switches behind the paintings in the following order:new born baby; infant; lively boy; young man; middle-aged man;bold looking old man and last picture, funeral, the last picture in the end of hall way.


Getting the Eagle And Wolf Crests And Enter The Lab:
Get the Doom Book 1 and the Doom Book 2. Go to the items screen, select the Doom Books, then press "Check". Turn the doom book so the pages face you then press X.The crests will appear. Put them at the water fountain with the eagle and wolf symbols to gain access to the labs.

Fight The STARS Bravo Team Member Forest:

When playing as Chris, just go to the balcony on thesecond floor of the mansion. Approach the corpse (Forest). Thereshould be a mansion key. Try to pick it up. Forest will attackyou. 

When playing as Jill, go to the room with the first zombie fromthe dining room. Then, go back to the main mansion room. Barrywill tell you to search the hall. Do that, then go directly tothe balcony. If done correctly, Barry should not be there. Goto Forest and try to take the key. There should also be a grenadelauncher located there. You can use it to kill Forest faster.However, if you try to pick up the mansion key Forest will attackyou. Note: :Forest is harder to kill than regular zombies.

Quick Look Of Wesker:

Use the following trick to quickly look for Wesker in the mansion hall. Start the game as Jill. When you reach the point where Wesker disappears, just go behind the big staircase and go back to Barry.

Shoot At Camera:

You can shoot the camera in the hallway where the dogs first jump through the window. You have to be far away from the camera when the first dog jumps through. Kill the dog and try to point the gun at the middle of the screen. Bullet holes should appear for a split second.

Alternate Ken's Corpse:
When you play the game as Jill, she and Barry will go into the dining room. After Barry walks forward, turn around and go out the door. Wesker will tell you to investigate if you hear gun fire. When you are back in the dining room, try to go out the door again. Barry will proclaim that it is not like you to lose courage. After Barry is done talking about the blood,walk towards the Grandfather Clock and a zombie will appear through the door. Barry will kill the zombie, and he will walk up to it and say "What the hell!". Then, after the scene in the first room in the mansion after Barry gives you the lock pick,go back to the dining room and go through the door. Go to where Ken's corpse is located and his body should be different. 
Note:When you view Ken's second corpse you cannot get the ammunition from him.