When playing single player, it's impossible to obtain every weapon in one playthrough, due to the boss Souls required in order to craft some of the rare weapons. It takes at least until New Game++ in order to get this, as there are 3 different weapons you need to craft with the Soul of Sif. However, it is possible to obtain a boss soul by having another player give it to you.
Having Additional Content does not have any effect on this list. You only need the base game to unlock Knight's Honor.
Soul WeaponsThese weapons require you to craft with the corresponding Boss soul and the required +10 Normal weapon (except for catalysts, which cannot be upgraded). Soul weapons are crafted only at the Giant Blacksmith in Anor Londo.
Tail CutoffsRare weapons that are obtained by cutting off the tail of certain enemies.
|Drake Sword||Hellkite Dragon|
|Dragon King Greataxe||Gaping Dragon|
|Priscilla's Dagger||Crossbreed Priscilla|
|Moonlight Greatsword||Seath the Scaleless|
|Dragon Greatsword||Stone Dragon|
|Gargoyle Tail Axe||Bell Gargoyles or Gargoyles in Anor Londo|
Covenant WeaponsRare weapons given by joining covenants.
|Gravelord Sword||Join the Gravelord Servant covenant.|
|Dark Hand||Join the Darkwraith covenant.
Dropped by Darkwraith Enemy.
Enemy DropsDropped by killing various enemies. Most weapon drops are rare, so boosting Item Discovery rate is a must. Item drops are boosted by equipping either the Covetous Gold Serpent Ring or the Symbol of Avarice (these two items don't stack) and increasing Humanity (Item Discovery bonus from Humanity maxes out at 10 Humanity). Maximum Item Discovery value is 410.
Corpse/Chest LootsObtained by looting a corpse or opening a chest.
|Dragon Crest Shield||Found on a corpse near the Undead Dragon in Valley of Drakes.|
|Havel's Greatshield||Found in a chest in a room behind an illusory wall in Anor Londo.|
|Dragon Tooth||Found in a chest in a room behind an illusory wall in Anor Londo.|
|Dragonslayer Greatbow||Found on a corpse in Anor Londo by entering the broken glass window in the entrance hall leading to Dragon Slayer Ornstein & Executioner Smough.|
|Velka's Rapier||Found on a corpse in Painted World of Ariamis after the Annex Key door.|
|Astora's Straight Sword||Found on a corpse near the Undead Dragon in Valley of Drakes.|
|Bloodshield||Found on a corpse near the Undead Dragon in Painted World of Ariamis.|
|Black Iron Greatshield||Found on a corpse next to the painting in Anor Londo that leads to the Painted World of Ariamis.|
|Effigy Shield||Found on a corpse in Tomb of the Giants.|
Not neededWeapons that are rare but not needed for the achievement. A few of them are inaccurately listed in the Strategy Guide as needed.
|Ghost Blade||Dropped by Wailing Ghost in New Londo Ruins.|
|Jagged Ghost Blade||Dropped by Dagger Ghost in New Londo Ruins.|
|Titanite Catch Pole||Dropped by Titanite Demon.|
|Gargoyle's Halberd||Dropped by bell-gargoyles.|
|Barbed Straight Sword||Dropped by Kirk Knight of Thorns.|
|Spiked Shield||Dropped by Kirk Knight of Thorns.|
|Ricard's Rapier||100% drop by Undead Prince Ricard.|
|Notched Whip||100% drop by Xanthous King Jeremiah.|
|Demon's Spear||Dropped by Bat Wing Demon in daylight Anor Londo.
Sold by Shiva of the East for 15,000 Souls.
|Obsidian Greatsword||Cut the tail of Black Dragon Kalameet1|
|Gough's Greatbow||Talking to Hawkeye Gough after killing Kalameet, also dropped by Gough2|