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