Complete the following tasks to unlock the corresponding costume.
Clubbin' Sheva Costume:
Complete ALL Chapters.
S.T.A.R.S. Chris Costume:
Complete ALL Chapters and find 25 BSAA Emblems.
Safari Chris Costume:
Complete ALL Chapters.
Tribal Sheva Costume:
Complete ALL Chapters and find ALL 30 BSAA Emblems.
Unlock Classic Horror Filter:
When you complete the game on the Amateur difficulty setting you will unlock the 'Classic Horror Filter' option which will basically makes the game black and white.
When you complete the game on any difficulty setting you will unlock Mercenaries mode, New Game+ mode, 'History Of Resident Evil' option, 'Infinite Ammo' option (must fully upgrade a weapon then purchase the unlimited ammo from the 'Bonus Features' section with points), ability to play as Sheva Alomar, and Chris' Safari and Sheva's Clubbin alternate costumes.
Unlock Infinite Rocket Launcher:
When you complete the game on any difficulty setting in under 5 hours you will unlock the Infinite Rocket Launcher. Once you have the weapon go to the 'Bonus Features' menu to enable the 'Infinite Ammo' option.
Unlock Original Resident Evil Camera and Controls:
If you start the 'Resident Evil 5: Lost In Nightmares' DLC and then turn around and investigate the entrance door three times you will be able to use the original 'Resident Evil' camera and controls. Note: The camera and controls will be reset if you die.
Unlock Extra Guardian Of Insanity:
When you play on the Professional difficulty setting in 'Resident Evil 5: Lost In Nightmares' DLC you will be able to fight the 'Guardian Of Insanity' that is on the walkway up above in the prison area of the Spencer Estate. It is worth 4,000 points in Score Stars.
Clear the game on the indicated difficulty setting to unlock the corresponding mode.
Unlock Mercenaries Reunion:
Complete the game on any difficulty setting.
Unlock Professional Difficulty:
Complete 'Resident Evil 5: Desperate Escape' on the Veteren difficulty setting to unlock the Professional difficulty.
Unlock Josh Stone:
Josh Stone becomes a playable character in Single Player mode when you complete the 'Resident Evil 5: Desperate Escape' DLC.
Unlock Jill Valentine:
Jill Valentine becomes a playable character when you complete the 'Resident Evil 5: Lost In Nightmares' DLC.
Unlock Bonus Characters in Mercenaries Mode:
When you earn an 'A' or higher rank in the indicated Mercenaries mode mission you will unlock the corresponding character.
'The Village' mission.
'Experimental Facility' mission.
Jill (Battle Suit):
'Ship Deck' mission.
'Public Assembly' mission.
'Ancient Ruins' mission.
'Missile Area' mission.
'The Mines' mission.
'The Prison' mission.
When you fully upgrade the indicated you will unlock the corresponding bonus weapon for purchase from the 'Item Management' menu.
Gatling Gun for Chris:
Fully upgrade the VZ61 machine gun.
Hydra Triple Barrel Shotgun:
Fully upgrade the Ithaca M37 shotgun.
Longbow for Sheva:
Fully upgrade the S75 rifle.
M93R Pistol (Samurai Edge Custom):
Fully upgrade the M92F pistol.
Smith and Wesson M500 Magnum (Handcannon):
Fully upgrade the Smith and Wesson M29 Magnum.
Unlock Retro Filter:
When you complete the game on the Normal difficulty setting you will unlock the 'Retro Filter' option which basically gives the game a sepia tone.