Unlockable | How to Unlock
Beginnings 1 | Beat Train Derailment 3
Beginnings 2 | Beat Beginnings 1 with an A rank or higher
Dark Legacy 1 | Complete Fall Of Umbrella 3
Dark Legacy 2 | Complete Death's Door and Nightmare 2
Death's Door | Beat Raccoon's Destruction 3 with an A rank
Fourth Survivor | Complete Dark Legacy 2
Nightmare 1 | Complete Mansion Incident 1
Nightmare 2 | Beat Nightmare 1 with an A rank or higher
Rebirth 1 | Beat Mansion Incident 3
Rebirth 2 | Beat Rebirth 1
Unlimited Ammo | S rank in all missions on Hard
Bonus:
Unlocking the Handcannon
When you unlock HUNK's scenario, Fourth Survivor, and play through it, there is a secret room located in the police station lobby. It is located next to the front doors. When you walk past this room, HUNK will face the doors leading into it for a brief moment; at this time, shoot the doors and they will open, taking you to the secret room. Inside is the handcannon, it is located on a desk at the left of the room.
Have fun
P/s: Official Walkthrough by Capcom
http://www.mediafire.com/?5y83j92gbowp5mp 
