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