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