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