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