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