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