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