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