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