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