~Prizes~
from gamefaqs

1. Savior - Beat the game the first time.
Secret Item - Lonely Moon Gauntlets

2. Butcher - Get the bad ending
Secret Item - Great Cleaver
Hint - In order to get the bad ending, it must be in your second playthough and up. During so you must kill more then 200 enemies.

3. Ambassador - Get the UFO ending.
Secret Item - Tesla Rifle
Hint - To get the UFO, it must be in your second playthough and up. You'll find a key on top of the staircase in an ally north of the Hospital near the beginning of the game called "Room 502 Key" where you will use in the motel.

4. Stalker - Have Flashlight on for less then 10,800 seconds (3 hours)
Secret Item - Night Vision Goggles

5. Collector - Collect more then 300 items

6. Sprinter - Beat the game in less then 7,200 seconds (2 hours)
Secret Item - Well not a special item, but with the costume equipped you'll never get fatigue.

7. Sharpshooter - Kill 75%+ of all enemies with firearms
Hint - Get the UFO ending and use the Tesla Rifle (since it has infinite ammo)

8. Weaponsmith - Kill 75%+ of all enemies with melee weapons
Hint - Use the Lonely Moon Gauntlets, Fire Axe, or Great Cleaver since these weapons have infinite durability.

9. Brawler - Kill 50%+ of all enemies with only your fists

10. Cartographer - Looked at map less then 25 times

11. Explorer - Distanced walked (or ran) greater then 22,500 m (22.5 km)

12. Daredevil - Beat the game without saving

13. Fireman - Rescued Alessa in the beginning in less then 80 seconds.
Secret Item - Fire Axe
Hint - Just time yourself and not bump into any fire or getting lost, and if you fail just restart the game since it's right at the beginning.

14. Codebreaker - Do the Konami Code during your second playthough or up.
Hint - it's up, up, down, down, left, right, left, right, X, O. If done right you'll hear a chime