Here is the full list of all 47 Resident Evil 0 achievements. It takes around 40-50 hours to unlock all of the achievements on Windows.
Finish the game with rank S.
Finish the game without combining herbs.
Finish the game without using a recovery item (including Green Chemicals).
Defeat an enemy with a knife.
Play Leech Hunter.
Finish the game on Hard difficulty.
Complete the treatment plant.
Defeat Queen Leech.
Obtain all keys and use them all.
Defeat the Proto Tyrant.
Try to push something heavy with Rebecca.
Complete the factory.
Fight off the Proto Tyrant.
Complete the laboratory.
Defeat Infected Bat.
Get picked up by the Infected Bat.
Complete the training facility.
Create a Custom Handgun.
Defeat a zombie by stomping on them.
Defeat an enemy by burning them.
Use a Green Chemical.
Defeat Centurion.
Destroy a zombie's legs.
Change into a costume.
Create a Molotov Cocktail.
Play the piano using Rebecca.
Shoot down a Hunter or an Eliminator while they are jump attacking in the air.
Finish Leech Hunter with rank A.
Kill 50 enemies with the Death Stare at full charge.
Finish the game without using a First-Aid Spray.
Attack an enemy to save your partner who is grappling with that enemy.
Complete the train.
Defeat Stinger.
Defeat an enemy with a critical-hit headshot.
Break free of a Cerberus while they are biting you or trying to push you down.
Finish the game without saving.
Defeat all bosses except Centurion using Rebecca.
Defeat Mimicry Marcus with a Molotov Cocktail or a Napalm Grenade.
Read all files.
Defeat Mimicry Marcus for the first time only using a knife.
Combine every type of herb with each other.
Obtain all weapons.
Defeat 16 bats in the church.
Put on Team Wesker costume.
Finish Leech Hunter with rank E or above.
Collect all of only one color of Leech Charms.
Defeat all enemies in Leech Hunter.