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