To unlock this mode you must have a 10 star ranking in One Weapon mode.
Full Weapons/Apartment Replenish Mode has the following features.
At the start of the game, upon entering the subway system you will see that each and every weapon is laid out in front of you. You can grab every one of them. Also, whenever you return to your apartment, you will find six
boxes of bullets in the laundry room as well as ten Health Drinks in your refrigerator.
Start a game in "Brand New Fear" mode. After entering the Forest World for the first time go to Jasper's car. Search near by for a cut tree trunk. Look next to it to find the chainsaw.
Successfully complete the game with a rank of at least 9 big stars. Start a game in "Brand New Fear" mode and look in Room 202 in the Apartment World to find a submachine gun for Eileen.
Alternate Eileen costume:
Start a game in "Brand New Fear" mode. Continue until the "Outside of Room 302" part of the game. Enter Room 303 and search it for Eileen's nurse costume.
Collect it and complete the game. When you start a new game, you can now have Eileen dressed as a nurse.
Alternate Cynthia costume:
Unlock all four endings and Eileen's alternate costume on a single game save.
Start a new game and select Eileen's nurse costume. Cynthia will wear her alternate costume.