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