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