Here is the full list of all 41 DARK SOULS: REMASTERED achievements. It takes around 60-80 hours to unlock all of the achievements on Windows.
Acquire best weapon through magic reinforcement.
Acquire best weapon through enchanted reinforcement.
Reach "To Link the Fire" ending.
Acquire best weapon through chaos reinforcement.
Acquire best weapon through lightning reinforcement.
Acquire all pyromancies.
Discover Darkwraith covenant.
Defeat Dark Sun Gwyndolin, the Darkmoon God.
Defeat the Four Kings, inheritors of souls.
Acquire the Art of Abysswalking.
Defeat Crossbreed Priscilla, the Lifehunter
Defeat the Soul Lord Bed of Chaos.
Acquire best weapon through standard reinforcement.
Defeat Seath the Scaleless, inheritors of souls.
Defeat the Soul Lord Gravelord Nito.
Discover Forest Hunter covenant.
Discover Blade of the Darkmoon covenant.
Discover Path of the Dragon covenant.
Acquire the Rite of Kindling.
Discover Gravelord Servant covenant.
Discover Princess's Guard covenant.
Acquire the Lordvessel.
Arrive in Anor Londo.
Discover Chaos Servant covenant.
Ring Bell of Awakening in Quelaag's domain.
Ring Bell of Awakening at Undead Church.
Discover Way of White covenant.
Arrive in Lordran.
Acquire Estus Flask.
Light bonfire flame.
All achievements completed. Congratulations!
Reach "The Dark Lord" ending.
Acquire all rare weapons.
Acquire all sorceries.
Acquire all miracles.
Discover Warrior of Sunlight covenant.
Acquire best weapon through crystal reinforcement.
Acquire best weapon through raw reinforcement.
Acquire best weapon through divine reinforcement.
Acquire best weapon through occult reinforcement.
Acquire best weapon through fire reinforcement.