Resident Evil: The Umbrella Chronicles Cheats & Tips

Shoot enemies on the top of the head for a critical hit.

with all the leeches find the biggest group throw a grenade this got me about 50 kills per time

Beginnings 1
Beat Train Derailment 3
Beginnings 2
Beat Beginnings 1 with an A rank or higher
Rebirth 1
Beat Mansion Incident 3
Rebirth 2
Beat Rebirth 1

get out your shotgun, to be safe, and wait for a zombie to bite you [if not shoot it or use knife]. Counter attack it: it gets straight kills.

Entry Location:
Loading Screen

If you shoot the symbol for Umbrella enough, it will make a sound.

To unlockk extra sub-scenarios you need to complete certain scenarios with a certain rank.

Dark Legacy 1 Complete Fall Of Umbrella 3
Dark Legacy 2 Complete Death's Door
Death's Door Complete Racoons Destruction 3 with an S or A ranking
Fourth Survivor Complete Dark Legacy 2
Nightmare 1 Complete Mansion Incident 1
Nightmare 2 Complete Nightmare 1 with an S or A ranking

Entry Location:
To unlock items from past Resident Evil games you need to get an "A" or "S" rank in the following senarios

Battery
Complete Dark Legacy 2 with "S" rank
Blue/Green Leech Charm
Complete Train Derailment 3 with "A" rank
Blue/Red/Green Chemical
Complete Umbrella's End 2 with "A" rank
Blue/Red/Yellow Gemstone
Complete Rebirth 2 with "A" rank
Book of Wisdom/Future Compass
Complete Raccoon's Destruction 1 with "S" rank
Briefcase
Complete Train Derailment 1 with "S" rank
Chronos Key
Complete Raccoon's Destruction 3 with "S" rank
Clark/Gail X-Ray
Complete Rebirth 1 with "A" rank
Crystal/Obsidian/Amber Ball
Complete Raccoon's Destruction 3 with "A" rank
Cylinder Shaft
Complete Nightmare 1 with "A" rank
Death Mask
Complete Rebirth 2 with "S" rank
Eagle/Serpent/Jaguar Stone
Complete Fourth Survivor with "S" rank
Emblem/Gold Emblem
Complete Nightmare 2 with "S" rank
Film A/B/C/D
Complete Umbrella's End 1 with "S" rank
Fire/Water Key
Complete Beginning 2 with "A" rank
Fuel Canteen
Complete Mansion Incident 3 with "S" rank
G-Virus
Complete Fourth Survivor with "A" rank
Hex Crank
Complete Nightmare 1 with "S" rank
Ink Ribbon
Complete Umbrella's End 3 with "S" rank
Joint N/S Plug
Complete Raccoon's Destruction 2 with "A" rank
King/Knight/Bishop/Rook Plug
Complete Dark Legacy 1 with "A" rank
Last Book, Vol. 1/2
Complete Nightmare 2 with "A" rank
Lighter Fluid
Complete Raccoon's Destruction 2 with "S" rank
Medium Base
Complete Dark Legacy 1 with "S" rank
Microfilm A/B
Complete Beginning 2 with "S" rank
Mixing Set
Complete Train Derailment 1 with "A" rank
MO Disk
Complete Mansion Incident 3 with "A" rank
Motherboard
Complete Beginning 1 with "A" rank
Picture (Ada and John)
Complete Death's Door with "A" rank
Plastic Bomb/Detonator
Complete Umbrella's End 1 with "A" rank
Relief of Discipline/Obedience/Unity
Complete Train Derailment 2 with "S" rank
S.T.A.R.S. Card (Brad's)
Complete Death's Door with "S" rank
S.T.A.R.S. Card (Jill's)
Complete Raccoon's Destruction 1 with "A" rank
Slide Cartridge
Complete Rebirth 1 with "S" rank
Spade/Diamond/Club/Heart Key
Complete Dark Legacy 2 with "A" rank
Square Crank
Complete Umbrella's End 2 with "S" rank
Statue of Good/Evil
Complete Train Derailment 2 with "A" rank
Sterilizing Agent
Complete Train Derailment 3 with "S" rank
Sun/Star/Moon Crest
Complete Mansion Incident 2 with "A" rank
V-Jolt
Complete Mansion Incident 2 with "S" rank
Vaccine
Complete Umbrella's End 3 with "A" rank
Valve Handle
Complete Beginning 1 with "S" rank

when the loading screen appears, shoot the umbrella sign as many time as posible and the umbrella sign will fall off its original place, keep shooting to make it bounce all over the screen.

You must complete all Hard mode missions with an S ranking. Once you have done this, the option to upgrade your weapons to level 5 becomes available. This gives your guns unlimited ammunition.

shoot a zombie 1ns with a shotgun and you should have infinite health

To unlock Cooperative mode in all missions, including the sub-missions (Wesker's missions), simply complete "The Fourth Survivor" sub-mission on any difficulty. An option will appear on the right when selecting characters that looks like two pistols and says "begin play with 2 players". Both players play as the same character, there are just two aiming reticles on the screen to play with.