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