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 rare weapons.
Acquire all miracles.
Acquire all pyromancies.
Acquire all sorceries.
Acquire best weapon through crystal reinforcement.
Reach "The Dark Lord" ending.
Acquire best weapon through enchanted reinforcement.
Acquire best weapon through divine reinforcement.
Acquire best weapon through lightning reinforcement.
Acquire best weapon through chaos reinforcement.
Acquire best weapon through occult reinforcement.
Acquire best weapon through magic reinforcement.
Acquire best weapon through standard reinforcement.
Acquire best weapon through raw reinforcement.
Acquire best weapon through fire reinforcement.
Discover Warrior of Sunlight covenant.
Discover Darkwraith covenant.
Discover Gravelord Servant covenant.
Reach "To Link the Fire" ending.
Defeat the Soul Lord Bed of Chaos.
Defeat the Four Kings, inheritors of souls.
Defeat Dark Sun Gwyndolin, the Darkmoon God.
Discover Blade of the Darkmoon covenant.
Defeat Seath the Scaleless, inheritors of souls.
Defeat the Soul Lord Gravelord Nito.
Discover Princess's Guard covenant.
Acquire the Lordvessel.
Defeat Crossbreed Priscilla, the Lifehunter.
Arrive in Anor Londo.
Discover Forest Hunter covenant.
Acquire the Art of Abysswalking.
Acquire the Rite of Kindling.
Discover Path of the Dragon covenant.
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.