Here's a complete guide on how to find all 5 Jack in the Boxes in Batman: Arkham Knight- Batgirl: A Matter of Family for PC, PS4 and Xbox One.
Finding all 5 Jack in the Box locations and activating them will help unlock the following Achievement / Trophy:
* “A Blade of Memory” (15 Gamerscore / Bronze Trophy) — Destroy all Teeth, Balloons and Jack-In-The-Boxes.
Batman: Arkham Knight – Batgirl: A Matter of Family Jack in the Boxes
How to find missing Jack in the Boxes?: In-game you can recognize them as the brown/red toy boxes with Harley Quinn’s clown head popping out after you activate it to give you a scare. After activation they will automatically be destroyed. Often found at random places like at the bottom or on top of tall structures.
You can find these both during the Batgirl DLC storyline and after during free roaming. While they aren’t marked on the map, you can easily find them in the outside areas (never inside buildings) by switching to Detective Vision.
Tip: Jack in the Boxes can be activated with the “Use” button command when standing near them.
Does the game save each Jack in the Boxes you collect?: Yes, the game will automatically save the Jack in the Box you just destroyed, so you don’t have to play to the end of a mission. If after finding / destroying a collectible you want to stop playing the game, it’s always recommended you save before you quit so you never risk losing your collectibles progress.
Where to find all Jack in the Boxes in Batman: Arkham Knight – Batgirl: A Matter of Family? The in-game collectibles locations for the Jack in the Boxes are described in this shown video guide.
The Jack in the Boxes are listed in the video in random order, but with map locations.
Timeline in minutes for the Jack in the Boxes Locations Guide:
• Jack in the Box Location #1 – 0:05
• Jack in the Box Location #2 – 0:30
• Jack in the Box Location #3 – 0:52
• Jack in the Box Location #4 – 1:25
• Jack in the Box Location #5 – 1:54