This applies to Leon's scenarios only.

Handgun Parts - Inside the locked desk outside of the library (corridor-side exit). A Small Key is required to open the desk.

Shotgun Parts - Inside the Vacant Factory passages. From the entrance to the factory outside of the sky tram, head down the left hand corridor first, then the left hand corridor again in the second passage room.

Magnum Parts - Inside the locker in the large chemicals room on the B5 floor of the laboratory (the room opposite the moth's chamber). The W. Box Key is required.

Combine each of the Parts with the corresponding weapon to increase the usefulness of the weapon in various ways.

Here I will list what you need to do to obtain each ranking:

A ranking - Beat the scenario in under three hours without using any First Aid Sprays or weapons that take up two item slots.

B ranking - Beat the scenario in under three hours, but by using a First Aid Spray and/or a weapon that takes up two item slots.

C ranking - Beat the scenario in over three hours, but less than seven.

D ranking - Fail to meet all of the above requirements.

When facing Mr. X in his normal form, you have the option of taking him down or running through the nearest door away from him. However, it's a better idea to take him down each time you encounter him.

I find the best weapons to take him down are the Sub-Machine Gun and the Gatling Gun. As they keep unloading the lead into Mr. X, it prevents him from getting too close to you before he passes out. You can then reap the rewards.

Taking him down will give you access to some ammo if you examine his unconscious body. At one point the result is unfortunately some Handgun Bullets (which is not exactly bad, but there are better rewards out there), but most of the time you'll receive ammo for the Shotgun, Bowgun, Grenade Launcher or Mangum (depending on which character you're using and at what occasion).

Other weapons that are good at taking Mr. X down are the Shotgun (regular and custom), Grenade Launcher with any kinds of Rounds, the Bowgun and the Magnum. The Custom Handgun is a decent last resort.

Before you enter the Umbrella Laboratory, take the W. Box Key from the Vacant Factory. Inside the Umbrella Laboratory head to the lab that's opposite the room with the giant moth inside. Once inside this room, head to the lockers on your character's immediate left and open the fourth one using the W. Box Key.

Leon will find Magnum Parts inside.
Claire will find Flame Rounds inside.

On any scenario, get to the RPD precinct without picking up any items. Before entering the RPD, head down the nearby stairs in the entrance courtyard and you will come across a zombie that was once Brad Vickers, the S.T.A.R.S. Alpha Team helicopter pilot from the first Resident Evil game (if you wish to know the events that led to his transformation into a zombie, play Resident Evil 3: Nemesis).

Brad has more stamina than a regular zombie and won't go down easily. However, keep firing at him and he'll eventually fall. Once you have done so, examine his body and you'll pick up a special key.

Once inside the RPD, head to the Darkroom once you have opened the hallway doors with the card key that Marvin Branagh gave you and examine the lockers. Use the special key on the lockers and you will be able to change your outfit. Leon gets a different police uniform and a hippie-like costume to choose from. Claire gets a cowgirl outfit and a new gun.

You can change your unfiform to default any time you like.

Don't get attacked from behind!!

1. To unlock Chris Redfield - Clear extreme battle mode level 2

2. To unlock Ada Wong - Clear extreme battle mode level 1