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