Back up your own save files first!
1) They can be found at:
C:\Users\user_name\AppData\Local\WB Games\Gotham Knights\Steam\Saved\SaveGames\long number folder\

2) Download my files from:
https://drive.google.com/file/d/1KAScRQd52ac7hZJeEPw9wo1GDSsggXD8/view?usp=sharing

3) Turn off Steam sync!

4) Launch the game, click continue. You should spawn in Tricorner Island.

5) Here's where you need to travel, see the highlighted:








Including a video just in case
Interact, scan or pick up the last collectibles and enjoy your achievements (below)

History Major
Locate all Landmarks of Gotham City


Claiming the Mural High Ground
Discover all the murals for Tim's Gotham City Street Art project


Batarang Collector
Retrieve every hidden Batarang in Gotham City


Read Owl About It
Collect all missing pages from the mythical Historia Strigidae


Success?! 😼