Alternate Costumes  Start a new game on normal.  Don't pick up anything when you get to the gate near the police station.  Go down the stairs and head past Brad Vickers.  Head upstairs and get the herb from the bushes nearest the stairs.  Go in the RPD and get the bullets at the desk in the back of the room. Head back to Brad and kill him. Take the special key from him. Head into the dark room and use the key to unlock the lockers. The clothing varies according to the characters. (Thanks to MonkeybutI@aol.com)

Infinite Gatling Gun  Beat the second scenario with an A or B ranking in under 2 and a half hours. (Thanks to VicFan123@aol.com)

Infinite Rocket Launcher  Beat the second scenario in under 3 hours with an A or B ranking. (Thanks to VicFan123@aol.com)

Infinite Submachine Gun  Beat either alternate scenario with a A or B rating without using health sprays.

One Hit Gator Kill  At the gator boss, inspect the yellow light on the left wall. While the light is in the gator's mouth, shoot him. (Thanks to MonkeybutI@aol.com)

Play As Hunk  Beat all the scenarios with either character with an A rank.  Choose to save to another scenario.

Play As Tofu  Beat all 5 scenarios and save the game.

Rebecca In B'Ball Uniform  In the STARS room, keep searching the desk until you get the film, then develop the film. (Thanks to BioHazord5@aol.com)

Reserve Power Control  Press Up, Down, Up, Up, Down. (Thanks to RynRaider@Aol.com)

Safe Combination  2236 (Thanks to MonkeybutI@aol.com)

Special Key  With the difficutly on Normal, go through the beginning without picking up anything at all. Right before the police station, go down the stairs and you will see a character from RE1 (now a zombie). Let it bite your feet and then kill it by smashing its head, shooting it with the gun, or using the shotgun. (Thanks to Merlin2624@aol.com)

Weapon Box Key  In any scenario, at the train that brings you to the other side of the lab, go to the side where you see something that looks like a green cannon. Walk up to it and use your lighter to set it off. (Thanks to ANTAbduct@aol.com)

RE2 Rating Chart  (Thanks to BEAVIS6432@aol.com)

Normal
1 1/2 hours, NO saves, NO infinite weapons, NO first aids, NO mixed herbs ="S"
1 1/2 - 2 1/2 hours 1-3 saves, 1-2 first aids, NO infinite weapons = "A"
2 - 3 hours, 1-7 saves, 1-4 first aids, NO infinite weapons = "B"
2 - 3 hours, 1-5 saves, 1-3 first aids, infinite weapons = "B"
3 - 4 1/2 hours, 1-7 saves, 1-7 first aids, NO infinite weapons = "C"
3 - 4 hours, 1-7 saves, 1-6 first aids, infinite weapons = "C"
4 1/2 hours & up, unlimited saves, unlimited first aids, infinite weapons ="D"
For "S" it MUST be the second scenario, and no weapon upgrades or acid rounds.

Easy
under 2 hours, 1-2 first aids, 1-3 saves, NO infinite weapons = "A"
2- 2 1/2 hours, 1-4 first aids, 1-3 saves, NO infinite weapons = "B"
2- 2 1/2 hours, 1-2 first aids, 1-2 saves, infinite weapons = "B"
2 1/2 - 3 1/2 hours, 1-5 first aids, 1-8 saves, NO infinite weapons = "C"
2 1/2 - 3 1/2 hours, 1-4 first aids, 1-6 saves, infinite weapons = "C"
3 hours or higher, unlimited first aids, umlimited saves, infinite weapons ="D"

Secret "X" rating
For this you MUST play the second scenario, Normal, use the crate only 4 times, NO mixed herbs or blue herbs, let 1 of every creature EXCEPT the Tyrant live, use only the handgun and the knife.

under 1 1/2 hours, NO saves, NO first aids, NO infinite weapons = "X"