• Unlock codes and puzzle solutions:

https://www.reddit.com/r/residentevil/comments/ak5x2z/made_a_sheet_with_all_the_major_puzzles_to_keep/ef7q8ei

• Visual walkthroughs on Youtube, but I used:

• It is HIGHLY recommended to attempt this only after you have beaten the game on your own once. Do not use this guide as a first playthrough as I will spoil everything.
  
• 3 saves MAX
  
• Finish under 2 hours and 30 minutes.
  
• If you die, DO NOT load from "Continue". Instead, quit to main menu and load the save manually.
  • If you click "Continue" from death, the time wasted will be added to the timer.
• DO NOT use infinite weapons or deluxe weapons
  
  • (UNCONFIRMED, TRY AT OWN RISK) Several people on RE reddit claim infinite knife is okay though

Run through zombie
Grab Key
Get grabbed or run past (your health will reset when you exit gas station, ammo won't)

Grab heal spray (skip laptop)
Help officer
Shoot door zombie legs (Safe), wait on right side of door and run past (risky)
Run past two zombies (stay right of guy)
-CUt scene-
Open gate with knife
Grab ammo and bank g herb
Run through hallway and grab ammo at left of room with window exit
Go right to west office and unlock pouch safe

• 9 left, 15 rIght, 7 left

Unlock speed loader from leon desk

• Left Lock: NED
  
• Right lock: MRG

Exit west office and go to photoroom stairs
Grab herb and board window
Upstairs, grab ammo from cop
Shoot leg of zed on stairs
Unlock locker

• DCM

Grab blue key

• Option 1 (Safe, slower):
  
  • Go through library, grab unicorn medalion in library downstairs door near stairs (Fish, Scorpion, Vase) and red book near desk at library exit, then grab lion medalion on lobby second floor (Lion, Branch, Bird)
• Option 2 (Risky, faster):
  
  • Turn around go back downstairs through west office to Marvin. Then go to library and grab red book.

Unlock waiting room (make sure to have 2 open inventory slots, bank first if neeDed)
Art room:

• Grab weapon key card
  
• Unlock statue arm (jewel for officer badge)

Go to Fire escape

• Grab board and chain cutter

Unlock west office

• Board Window
  
• Grab ammo from cop corpse
  
• Grab flash if you can
  
• Grab valve
  
• Grab electric fuse
  
• Exit to lobby
  
• Bank ribbon and valve

Unlock West office

• Discard key

Keep bolt cutter on
Run through knife gate hallway
Unlock bolt cutter room

• Grab detonator
  
• Discard bolt cutter

Go to storage room

• Unlock locker 109
  
• Grab pistol ammo
  
• Unlock nade launcher

Go to film room

• Bank
  
• Store Nade launcher, grab valve

Go to locker room, grab portable safe and locker items
Unlock valve door
Grab flame rounds on bench
Run to STARS room

• Grab battery and stacked items if possible

Go back to locker room, head upstairs to detonate

• Grab pistol ammo on shelf
  
• After planting detonator, run to library door and hold door open to stop shelf falling
  
• Grab maiden medallion

Exit to library

• Fall through floor
  
• Grab unicorn medalion if you haven't already

Unlock underground staircase

• Bank
  
  • Store Nade launcher

BOSS Birkin stage 1

• Strat:
  
  • Don't shoot if eyeball is closed
    
  • Grab all items around room first while damaging his eyeball
• Fighting him:
  
  • When he's chasing you, run in a circle around the center block.
    
  • If you have a straight line path, stop running for a second and bait his attack anim
    
  • Shoot eye when he attacks

Climb up ladder, go right room

• Unlock left locker
  
• Grab herb to left of door

Bank at garage

• Grab nade launcher and flame rounds for lickers

-Parking garage cut scene-

Go right and head to mourge

• Dog kennel
  
  • Two lickers, walk ONLY.

Enter mourge, open zombie with diamond key
Run past zombie at door
Entering Kennel, move close to licker and shoot with flame
Try to run past second licker, shoot with flame to be safe.
Exiting hallway, flame licker on ceiling
Exit to garage
Unlock Chief Iron elevator door
Grab nade launcher upgrade
Go up to Chief Iron office

Enter Irons office
Grab heart key and items in other room
Go upstairs

• Grab board, flash and ammo
  
• Grab electronic part (heart key)
  
• Grab large gear

Go back to Iron's office and bank eletronic part and flash
Go downstairs to board window and grab jewel case behind Heart door

• Licker after picking up, run out

Back to Irons office
Bank
Go to watEr pump
Stun lady zed
Grab two G herbs at end
Stun lady zed again and go upstairs
Unlock helicopter hallway
Grab R herb, combine
Shoot Mr. X face three times when he's lifing chopper
Shoot again when he's walking, stun him
Run past, go to lobby

(You may want to save here now as this part can be brutal)

• Bank
  
  • Keep keys, Grab nade launcher for lickers
    
  • Unlock officer badge for smg

Head to west office, go to records room (watch out for licker at door, flame him)
Unlock with heart key and grab jack for library

• SAFE option
  
  • Stun Mr. X in this room

Otherwise, juke X and run straight to west office
When it's safe, open west office door and flame licker (kill to be safe)
Run to film safe room

• Bank
  
  • store nade launcher
    
  • grab diamond key

watch out for licker still
Go to STARS office

• Unlock SMG
  
  • Don't forget to retrieve badge from PC

Go down hall to diamond room
Grab portable safe
Unlock exit to library unicorn room
Aggro zombies and place jack on shelf
Aggro zombies to door and Run out back to lobby
library zeds may follow you and fall from second floor
Bank at lobby

• Grab large gear, bank extra stuff
  
• Unlock both portable safes and stack the two keypad keys

Go through west office again and go to storage room

• Unlock 203 for Hip Pouch
  
• 103 for knife
  
• 208 for flame ronds

Run back to lobby
When all zombies fall, stun Mr. X in lobby
Go to library

• Solve library puzzle

Stun zed corner of pillar
Solve clock tower

• Grab electronic part

Head to irons office from 3F
Grab parking garage key
Solve electric panel

Grab block from doll behind
Solve block puzzle
Exit
Grab key from wall
Hide from irons

• Run upstairs
  
• Hide behind middle drawer
  
• When Irons hits his foot, hide under table on other side
  
• as soon as he goes to the middle drawer and looks to the wall, hide behind the drawer nearest the bathroom door
  
• Wait until he enters bathroom and grab key

Escape

GraB SMG

• Head to parking garage
  
  • Opening the gate, Mr. X will spawn

Loop around white car and leave
Go down street, you will see zeds at a gate
Get close to have them open it
Run around the street once then go inside gate
Kill Zed Doggos
Grab herb and smg ammo on bench in basketball court
Kill z doggos behind fence
Head to bus, grab another herb
Entering bus, there will be one standing zed; stun him
Kill z doggo outside bus and enter orphanage

-Cut scene-

Enter room ahead
Grab items and bank

• Bank
  
  • Store SMG
    
  • Grab handgun and knife

Exit and go down hole
Follow sewer
Grab B herb to your left on ledge
Head to cable car
Two woke zeds, stun zombie closest to hole.

• Go to storage box
  
  • Grab all HE Grenade, flash grenade and 1 knife

Cross the bridge, go left and grab T plug and herb
Go downstairs, clear the two zeds

• I personally throw my explosive grenade

Climb down ladder
Go left and up the ledge
Shoot sewer zed to wake him and run past

• If you can't do this, equip flash grenade and let him grab you, then run

Run past second sewer zed, keep right, then keep left at the sewer pipe.
Get up ledge
Grab king and queen plug in room
Grab shock gun
Head back and run past sewer zeds
Go up ledge
When climbing down, trigger charging zed and immediately go up right ledge.
Wait until he dives in the water; as soon as he does, climb down and run
Grab sewer key
Go back to storage and clear up inventory

• Grab police badge

Go back down stairs and open gate to right.
Grab high powered gun powder and quicklY run past the sewer zed hanging left.
Go upstairs to small room and kill zed, dont unlock door yet
Grab rook plug
Unlock sewer door down the hall
Move metal shelf and go up elevator
Unlock badge case
Go back down to solve chess puzzle

(You may want to Save before birkin stage 2 fight).

Bring SMG
Go downstairs grab B and G herb.
Go into red room and grab R herb, combine.
Solve power puzzle
Head to door, birkin triggers

• Stand near barrel closest to large gate for safest spot (you may get hit, RNG)

After fourth ceiling bash, go left of gate, birkin will bust through
As soon as he opens the gate, stay on left side and run past.

Boss Birkin Stage 2

Strat:

• Press button to move crate
  
• Grab flash and knife
  
• Shoot eyeball until he stuns, keep him in middle.

When you stun him, make sure you are near the button.

• Hit button again to hit him, keep shooting him while it comes.
  
• Repeat until defeated.

Grab pistol ammo near button ledge and SMG ammo near ledge you dropped down.
Go back and get sherry.
Get sherry to cable car.
Unlock safe (code on side).

• Pistol heavy ammo upgrade

Head to lab.

Put sherry in security room
Bank extra stuff
Head to side door near reception
Go down to cafeteria.
Keep left enterIng and head up to ladder
Drop down and grab items, knife.
Turn right to napping area and grab wristband.
Watch out for hunk zed (knife him).
Run back to lobby
Go down main hall and head to left door

Enter lab and grab flame nade launcher.
Run past plant zeds

• Shoot yellow orbs on plant zeds to stun them and run past if need be

Unlock mixing station and hatch to downstairs (refer to unlock codes in "Resources")
Grab vial
Go to mixing station
Solve vial puzzle (refer to unlock codes in "Resources")
Run past plant zeds down to hatch
Head to break room and turn right

• Beware of lickers, you should kill them because you will come back here.

Go upstairs, clear zeds as you will be coming back
Grab modulator
Go back downstairs same way, turn right to cooling room and cool vial.
Go back uptairs and insert cool vial.
Grab second wristband and exit lab.

BOSS - BiRkin Stage 3
Grab vial

(You may want to save before Birkin stage 3 fight, but personally I find him easy).

Bank, take whatever weapons you need and 1 heal.

• My loaDout is SMG pistol and shock gun

When you start, shoot out his eyeballs on his leFt knee, his right arm, and his back.
Grab all items down here while you are fighting him.
When you shoot out his eyes, he will stun and reveal his stomach eyes.

• Use shock gun.

After two times, he will transform and only have stomach eyes.
He will grab the middle pillar and throw it, rUn to eiter side of the room away.
Keep shooting him untiL defeated
Escape facility.

If you still have under 3 saves, this is a good final save. Otherwise, this fight is easy.

Escape the facility until you reach train car.

• Zed plants will be here, bring flame launcher if you need it.
  
• Otherwise, just shoot their orbs and run past.

Grab 1 healing and whatever weapons you want, but keep Two slots open.
Grab plugs then grab minigun.

BOSS Birkin Stage 3

Starting, shoot Birkin's eyeballs out with minigun at top.
When he drops down, just run around the car sticking to the two noses of the train.

• He has a charge attack and flailing attack, so just keep juking him and shooting.

He will retreat to climb up, don't shoot. Then he will jump down to the car and it will repeat.

• The second time he climbs up, he will jump down straight to you. So try to run around and again stick to the nose of the train to avoid his pounce.

Repeat until dead.

Congratulations! If you were fast and agile enough, you have cleared with S+ rank! Enjoy minigun. :D