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 saving.
Put on Team Wesker costume.
Defeat 16 bats in the church.
Kill 50 enemies with the Death Stare at full charge.
Combine every type of herb with each other.
Defeat Mimicry Marcus for the first time only using a knife.
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).
Defeat all bosses except Centurion using Rebecca.
Collect all of only one color of Leech Charms.
Obtain all weapons.
Finish Leech Hunter with rank A.
Finish Leech Hunter with rank E or above.
Play Leech Hunter.
Defeat all enemies in Leech Hunter.
Finish the game with rank S.
Get picked up by the Infected Bat.
Destroy a zombie's legs.
Break free of a Cerberus while they are biting you or trying to push you down.
Change into a costume.
Complete the treatment plant.
Defeat Queen Leech.
Read all files.
Obtain all keys and use them all.
Defeat the Proto Tyrant.
Try to push something heavy with Rebecca.
Complete the factory.
Fight off the Proto Tyrant.
Complete the laboratory.
Use a Green Chemical.
Defeat a zombie by stomping on them.
Defeat Infected Bat.
Complete the training facility.
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 an enemy by burning them.
Defeat Mimicry Marcus with a Molotov Cocktail or a Napalm Grenade.
Defeat Centurion.
Defeat an enemy with a critical-hit headshot.
Complete the train.
Create a Molotov Cocktail.
Attack an enemy to save your partner who is grappling with that enemy.
Defeat Stinger.
Defeat an enemy with a knife.