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