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