The The Old Hunters Add-on for Bloodborne has 6 trophies - 4 bronze, 1 silver and 1 gold.
Defeat the beast that was once Laurence, the First Vicar.
Acquire all old hunter weapons.
Defeat Great One: Orphan of Kos.
Defeat Lady Maria of the Astral Clocktower.
Defeat the failed attempts to become Great Ones.
Defeat the beast that was once Ludwig, the Holy Blade.