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