Posters #1 through #8
These are awarded after reaching a certain number of products, while also not failing to bring the products in during your allotted time.

Poster #1 - 28
Poster #2 - 48
Poster #3 - 68
Poster #4 - 88
Poster #5 - 108
Poster #6 - 128
Poster #7 - 168
Poster #8 - 188

For example, if you fail a round when you have between 68 and 88 products, you won't get Poster #4, but you can still get Poster #5 if you succeed while you have 88 to 108 products.

Dungarees
This is awarded after buying the last unlockable item, and is purely cosmetic. It costs 96 stars, so make sure to always serve the customer who has the most stars first.

Clocking Off
Awarded after beating the game on any difficulty.

All of the following achievements are awarded after collecting FOUR items in a given category, and placing them next to each other. While some of the categories contain more than four items, you only need four of the items for the achievement to pop.

Also note that this game contains 501 items, but you will only see 200 in a regular game, meaning that you may have some difficulty obtaining some of the achievements, as it will boil down to getting lucky with which products you're given.

The items you can use for each achievement are as follows:

Astronomy Achievement


The Music Achievement


That Wheels Achievement


The Banana Collector


Got Apples!


All The Camels

(Yes, "All the Camels" and "Got Apples!" share a product.)

Pattern Recognition


Quatro Formaggi


The Haberdashery Achievement


The English Collection


Mr Bricolage


Origin of Species


Cryptozoology

HATS?!


Arboretum


Sports.


Man's Best Friend


Get In The Sea!


Amateur Pharmacist


Insects Are My Friends.


The Secrets Of Wind


The Time Achievement


Note: When placing the items next to each other, there does not seem to be a specific order or configuration, so long as the four are connected in some way. For example, I was able to get achievements to pop with each of the following configurations:

A method I used to get the last few achievements I needed was to start a new game and see if the initial products available were in one of the collections I needed. If this was the case, I'd often only have to play a couple rounds into the game to get four of the items in that collection, since the game generally gives you new products that are within a collection you already have items in. Then, you can delete the save and restart till you find items within the next collection you need. Also note that you can skip the tutorial by going to the menu (pressing escape) while in the tutorial.

If you're interested in finding out what each item is categorized into, including the items that are not listed here and do not fall into any of the achievement categories, you can check out the files by going to C:\Program Files(x86)\Steam\steamapps\common\Wilmot's Warehouse\WilmotPC\img\tiles

Also, if you're not interested in going through multiple runs of the game in case you don't get all the items you need, there seem to be some work-arounds by changing some of the game's files. You can check these out in more detail in J_God_Yamaxanadu's guide: https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=1854415481

If anyone has any questions or comments, feel free to reach out!