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