All credit for this guide goes to SnowNinjaRaccoon (DK) & PowerPyx from PowerPyx.com who provide a complete guide to finding all collectibles and all weapons in Vampyr.
This guide covers all 11 off-hand weapons in chapter order, although the guide they created also covers all collectibles and ranged weapons as well.
Prologue:None
Chapter 1:[Off-Hand Weapon #1] Used Stake
After you leave the bed where you unlock your first skills, go downstairs and some enemies will break through the door. Teleport to the next building. There’s a corpse downstairs that holds this weapon (you have to walk past it on your story path).
Chapter 2:[Off-Hand Weapon #2] Used Liston Knife
In the basement of the morgue. You will be forced to go there during the story.
[Off-Hand Weapon #3] Used Truncheon
Dropped by the Boss “Vincent Sheen”. You fight him and his brother “Toby Sheen” on the way back from Whitechapel to the Hospital.
Chapter 3:None
Chapter 4:[Off-Hand Weapon #4] Good Dagger
Ascalon Club 2nd Floor.
Chapter 5:None
Chapter 6: Important: Make a manual Save Game Backup at the start of Chapter 6! See spoiler:
*** Spoiler - click to reveal ***Many weapons are from embracing different citizens so if you’re on your Pacifist run for trophy “Not even once” it is important you keep a backup save from before embracing anyone (killing people also voids side quests)!!!
After beating Chapter 6 there’s no way to go back (you would have to start a new game and lose all your progress). The Harriet Boss Fight is the point of no return, when this fight triggers is the last chance to go back. In Chapter 6 you can still free-roam and revisit places.
PS4 Backup: Go to PS4 Settings > Application Saved Data Management > Saved Data in System Storage > Copy to USB Storage (if you back up to PS+ Cloud be sure to disable Auto-Upload or else it will overwrite your save).
Xbox One Backup: Quit the game at the start of Chapter 6 to trigger the automatic cloud upload > (double-check that it really uploaded to the cloud) > go offline (pull the cable or disconnect from internet in console settings) > kill everyone for their collectibles > delete your local gamesave > go online again to automatically re-download your cloud-save and continue with the other path normally.
[Off-Hand Weapon #5] Used Priwen Stake
Found in the same room as Collectible 25. (Follow Thelmas Questline in Hospital to get there, 2nd Priwen Outpost you visit in the quest).
[Off-Hand Weapon #6] Cristina’s Dagger
Embrace Cristina in Whitechapel.
[Off-Hand Weapon #7] Charle’s Truncheon
Embrace Charles in West End.
[Off-Hand Weapon #8] Thoreau’s Surgical Knife
Embrace Thoreau in Hospital and loot the weapon in the office next to yours.
[Off-Hand Weapon #9] Gwyneth Surgical Knife
Embrace Gwyneth in Hospital.
[Off-Hand Weapon #10] Sabrina’s Dagger
Embrace Sabrina in the Docks.
[Off-Hand Weapon #11] Ichabod’s Stake
Embrace Ichabod in the Docks.
[Off-Hand Weapon #12] Giselle’s Dagger
Kill Giselle in the Docks. She is wearing riot gear and attacks on sight.
[Off-Hand Weapon #13] Charlotte’s Stake
Given by Charlotte after finishing her questline. From Venus’ house teleport from the balcony to the house on the other side of the street and then follow the blood trail.