Knight's Honor Trophy / Achievement Guide
Knight's Honor is a Trophy and Achievement in Dark Souls and Dark Souls Remastered. It is arguably the hardest achievement to unlock in the game. To get this achievement you must obtain certain hard-to-get weapons and shields on the same character. Sometimes a glitch allows for the achievement to trigger when collecting in different characters, but if you want to be sure aim to get them all on one.
Weapons and Shields ascended from Boss Souls
This requires a certain type of regular weapon, upgraded to 10+, and the Soul of a defeated Boss. The Giant Blacksmith in Anor Londo will ascend the weapon and soul for 5000 souls. Any properties, stats or movesets of the previous weapon will be replaced when forged into a Boss Soul weapon, so it is usually a good idea to use something cheap or easily obtained when creating them. Most Boss souls are used to create two different weapons, but the Soul of Sif is used for three, so a minimum of NG+2 will be needed to acquire all Boss Soul weapons.
You must ascend a +10 Katana and the soul of Quelaag.
Ascend a +10 shield or buckler, and the soul of The Moonlight Butterfly. Practically any shield can be used given that it's been upgraded to +10.
Ascend any +10 Bow, and the soul of Gwyndolin.
Ascend any +10 Cestus or Claw, and the core of the Iron Golem.
Ascend any +10 Spear or Rapier, and the soul of Ornstein.
Ascend any +10 Axe, and the core of the Iron Golem.
Ascend a +10 dagger, sword or greatsword, and the soul of Gwyn, The Lord of Cinder (can only be done on NG+).
Ascend a +10 shield or buckler and the soul of Sif, The Great Grey Wolf.
You must Ascend a +10 Dagger, Sword or Greatsword, with the soul of Sif, The Great Gray Wolf. Using these weapons for ascension will give you the cursed version of the Greatsword of Artorias. The name will not indicate any difference between the true and cursed variant, but the cursed version has a stat requirement of 18 for Faith and Intelligence.
You must ascend a +10 Broken sword, and the soul of Sif, The Great Gray Wolf. Basic Zombies or the Defiled in Blighttown will usually drop broken swords. The name will not indicate it is the true version of the greatsword, but it has higher stat requirements of 20 for faith and intelligence.
Ascend any +10 Halberd, Scythe or Whip, and the soul of Priscilla. Unlike other Boss Souls, Priscilla's soul only ascends one weapon.
Ascend any +10 Spear or Rapier, and the soul of the Moonlight Butterfly.
Ascend a +10 Curved Sword, and the soul of Quelaag. A scimatar is a good choice.
Ascend a +10 Hammer or Great Hammer and the soul of Smough.
Weapons and Shields dropped by enemies
Random drop from Axe-wielding Black knights.
Black Knight Greatsword
Random drop from Greatsword-wielding Black Knights.
Black Knight Halberd
Random drop from Halberd-wielding Black Knights.
Black Knight Shield
Random drop from any Black Knight.
Black Knight Sword
Random drop from any Sword-Wielding Black Knight.
Found in the Undead Asylum (revisited). Acquired as drop from the now hollow Oscar who first gave you the Estus Flask.
Rare Random drop from the Bat Wing Demons in Anor Londo (whilst sunlit). Can also be purchased from Shiva of the East in Blighttown, if you are a member of the Forest Hunter's Covenant.
Rare random drop from the giant gold knights in Anor Londo (whilst sunlit). It can more easily be purchased from the Giant Blacksmith for 5000 souls.
Weapons and Shields found as treasure
Anor Londo. Found in a treasure chest alongside other chests containing Havel's Equipment, located behind a hidden wall in a Fireplace.
Anor Londo. When you reach the Giant Blacksmith, go back into the large main room ang go up the stairs. At the top of the stairs you'll find some big windows with one broken. Exit the window heading right, and you will see a corpse with the bow.
Tomb of Giants. Found on a corpse just before the second bonfire.
Weapons acquired from covenants
Given as a gift when joining Gravelord Servant Covenant. (confirmed by SilverKnightDragon)
Weapons acquired from cutting off tails
Undead Burg. Use arrows to shoot the tail of the Red Drake, or Bridge Wyvern, from underneath the bridge. It can also be cut off from on top of the bridge, if the Bridge Wyvern has landed to attack you.
Painted World of Ariamis. Cut off the tail of Priscilla - this can be difficult to do considering her ability to turn invisible, so consider careful strikes or weak weapons. Tag her with a throwing knife so you can track her while invisible. use weak weapons or the Force spell to break her poise, then go for her
Undead Parish. During the boss fight, cut off the tail of the first Bell Gargoyle. Easier if focused down before 2nd Gargoyle comes into the fight. It can also be obtained from the two gargoyles near the beginning of Anor Londo.