There is a common glitch where every shop is listed as "not visited". However, if you hold
to zoom all the way out, you can scroll to the Frontier (icon looks like a triangle), Boston (circle with a B) and New York (circle with NY), icons. If each region has one shop unlocked, you can get the achievement.UPDATE: I'm seeing reports that "not visited" is disappearing from the icons and they're not turning white (like they should've to begin with). When this happens, if you zoom out, the unlocked stores counter may say 0. Therefore, the achievement may need to be flagged as buggy-.
Here's how to prevent losing the achievement: as soon as you have a shop unlocked, send a caravan to it. You can even use a shop to send a caravan to the same shop.
If anyone has a good workaround after losing access to the shops, please let me know in the comments section below.UPDATE 2: Tenreth restarted the game and all shops were unlocked again. You can read the discussion here: Assassins creed liberation remastered major bug
If you're at the Homestead, you can fast travel to the manor. From the front entrance enter the room on your immediate left. Press
to open the Account Book, then
twice to go to the trading portion of the Account Book. Now, press
to bring up Land Convoy and then
Now, select a resource (anything you want), then any of the three Boston merchants. They are:
Hancock's Store No. 5
Elizabeth Murray's Fineries
Child's Still House & Dry Goods
Now repeat the process until you're ready to select a merchant, then press
. These are the New York merchants:
De Lancey's Imports & Goods
Van Brugh's Spices
Repeat the process again until you're ready to select a merchant. Then, press
twice. Here are the Frontier merchants:
The Walking Haberdashery
The Milliner's Wares
Select one from each region to send a convoy to, then press
However, if you're already in Boston, the Frontier, or New York, you can enter a store and the Accounting Book is to the right of the shopkeeper. Or if you're already browsing his wares, you can press
to enter the Accounting Book.