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