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.
Collect all of only one color of Leech Charms.
Finish the game without using a recovery item (including Green Chemicals).
Put on Team Wesker costume.
Defeat all bosses except Centurion using Rebecca.
Read all files.
Defeat 16 bats in the church.
Combine every type of herb with each other.
Kill 50 enemies with the Death Stare at full charge.
Obtain all weapons.
Finish the game with rank S.
Finish the game without combining herbs.
Finish the game without saving.
Finish the game without using a First-Aid Spray.
Defeat Mimicry Marcus for the first time only using a knife.
Finish Leech Hunter with rank A.
Finish Leech Hunter with rank E or above.
Play Leech Hunter.
Defeat all enemies in Leech Hunter.
Defeat an enemy with a knife.
Complete the treatment plant.
Defeat Queen Leech.
Obtain all keys and use them all.
Defeat the Proto Tyrant.
Complete the factory.
Fight off the Proto Tyrant.
Complete the laboratory.
Defeat Mimicry Marcus with a Molotov Cocktail or a Napalm Grenade.
Defeat Infected Bat.
Defeat an enemy by burning them.
Get picked up by the 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 with a critical-hit headshot.
Use a Green Chemical.
Try to push something heavy with Rebecca.
Defeat a zombie by stomping on them.
Destroy a zombie's legs.
Defeat Centurion.
Complete the train.
Create a Molotov Cocktail.
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.