Here is the full list of all 44 Resident Evil achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Visit all places on all maps.
Obtain all weapons.
Finish the game without saving anyone using Jill.
Finish the game without saving anyone using Chris.
Defeat a Crimson Head prototype1 using Jill.
Obtain the Helmet Key using Jill.
Defeat Yawn using Jill.
Save Chris using Rebecca.
Finish the game saving Chris and Barry using Jill.
Break into the laboratory using Jill.
Save Chris from confinement using Jill.
Save Barry from Lisa Trevor.
Save Jill using Barry.
Finish the game saving Rebecca and Jill using Chris.
Save Jill from confinement using Chris.
Save Rebecca from a Hunter.
Burn up two zombies at the same time with the lighter.
Burn up a zombie.
Defeat a Crimson Head.
Obtain the "Last Book Vol. 2" using Chris.
Defeat mother Neptune.
Defeat Plant 42 using Chris.
Defeat a Hunter.
Defeat Black Tiger.
Defeat Lisa Trevor using Chris.
Obtain the Stone & Metal Object using Chris.
Survive your first encounter with Yawn.
Save Richard with a serum.
Finish the game in Invisible Enemy mode.
Finish the game with Jill and Chris.
Finish the game in Real Survival mode.
Finish the game using Chris.
Finish the game on Normal difficulty or higher.
Finish the game on Hard difficulty.
Finish the game using only your knife.
Finish the game without saving.
Obtain all costumes.
Finish the game on Very Easy difficulty or higher.
Finish the game on Easy difficulty or higher.
Finish the game in three hours.
Finish the game in five hours.
Finish the game using Jill.
Die for the first time.
Defeat a zombie.