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