To get the special costumes you must do the following.
Start a new game on normal difficulty. Don't pick up anything.
When you get to the gate that leads to the police station go down
the stairs. Down there will be Brad Vickers, the pilot from Resident
Evil (he's a ZOMBIE!) Head past him and go up the stairs. Get the
herb from the bushes closest to the stairs. Go in the R.P.D. and get
the bullets at the desk in the back of the room. Go back to Brad
and fill that damb zombie full of bullets. Inspect him and take the
special key.
When you get to the dark room there are some lockers, use the key
to unlock one and get the costumes. With Claire you get a cool
denim jaket and the Colt S.A.A. gun. With Leon you either can
choose a leather jacket with a skull on the back or a tank top and a
baseball hat.
Note: The quickest way to kill Brad is to get close then walk
backwards. Let him lunge at your feet then stomp him in the head.
This saves a lot of bullets and only takes away 1/8th of you health.
One-Hit Gator Kill
When you fight the gator boss, he starts coming towards you and
you see a yellow light on the left wall. Inspect the light, it will fall
and
the gator will eat it. While the light is in its mouth shoot it and the
gator will explode!
Safe Combination
The combination for the safe is 2236.