Full list of all 41 Dark Souls achievements worth 1,000 gamerscore. It takes around 80-100 hours to unlock all of the achievements on Xbox 360.
Defeat the Soul Lord Bed of Chaos.
Defeat the Soul Lord Gravelord Nito.
Discover Path of the Dragon covenant.
Reach "The Dark Lord" ending.
All achievements completed. Congratulations!
Acquire all miracles.
Acquire all pyromancies.
Discover Warrior of Sunlight covenant.
Acquire all sorceries.
Acquire best weapon through magic reinforcement.
Acquire best weapon through chaos reinforcement.
Acquire best weapon through divine reinforcement.
Acquire best weapon through fire reinforcement.
Acquire all rare weapons.
Acquire best weapon through standard reinforcement.
Acquire best weapon through enchanted reinforcement.
Acquire best weapon through occult reinforcement.
Acquire best weapon through lightning reinforcement.
Acquire best weapon through crystal reinforcement.
Discover Darkwraith covenant.
Discover Blade of the Darkmoon covenant.
Reach "To Link the Fire" ending.
Defeat the Four Kings, inheritors of souls.
Discover Gravelord Servant covenant.
Acquire the Rite of Kindling.
Acquire best weapon through raw reinforcement.
Defeat Seath the Scaleless, inheritors of souls.
Defeat Dark Sun Gwyndolin, the Darkmoon God.
Discover Princess's Guard covenant.
Acquire the Lordvessel.
Defeat Crossbreed Priscilla, the Lifehunter.
Arrive in Anor Londo.
Discover Chaos Servant covenant.
Ring Bell of Awakening in Quelaag's domain.
Acquire the Art of Abysswalking.
Discover Forest Hunter covenant.
Discover Way of White covenant.
Ring Bell of Awakening at Undead Church.
Arrive in Lordran.
Acquire Estus Flask.
Light bonfire flame.