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