Chained Echoes

In order to unlock this achivement you will need to play almost the whole of the storyline to have enough reward tiles. Took me about 70 hours of playthrough to get the 120th pretty much playing naturally (with some.backtracking and farming tiles).
Naturally, you must first unlock access to the board itself which occurs....
Here on out you can look at the tiles to see the requirements and once you get 120 of them unlocked that are next to each other, this will pop. There is a counter at the bottom left of the reward board to make it easy to track.

Note: Not every tile for the region will be doable at the beggining and you may have to come back later to mop up when you are higher level.


If you need extra handholding, this is a good site:
https://www.neoseeker.com/chained-echoes/walkthrough/Rohlan_...