Mod Picker offers a unique categorization system, which is important to understand to use the platform correctly.
There are 9 super-categories on Mod Picker. These are top level categories which encompass all mods. The super-categories are:
Each super category has a number of sub-categories, which allow you to further classify mods. Always try to categorize mods into sub-categories before putting them into super-categories.
You should never put a mod in a sub-category and its super-category. This is unnecessary, as it is already implied that a mod in a sub-category is also in the super-category.
Check out the Mod Picker Categories document for a full list of subcategories.
The Mod Picker category system functions properly with a good understanding of category priority. Certain categories are rendered redundant by other categories.
A mod adds a new weapon to the game, like Insanity's Celtic Katana. This mod clearly belongs in the Items - Weapons category, and should not be put in the Audiovisual - Models & Textures category. Even though the mod has new models and textures, almost all new weapons must have new models and textures, so the category is redundant.
A mod adds a totally new land to explore, like Falskaar. The mod belongs in the Locations - New Lands category. The categories New Characters, Items, Gameplay - Quests, etc., are all redundant because almost all mods that classify as Locations - New Lands include new characters, items, and quests.
Mod Picker tracks category priorities internally, rendering them as messages when you click the Check Categories button when selecting categories for a mod from the Submit Mod or Edit Mod pages. These are only suggestions, you do not have to follow them.
Check out the Mod Picker Category Priorities document for a full list of category priorities.
Interfacing with categories is almost always done through the category tree. This is a component which is used on the Mods Index, Submit Mod Page, and Edit Mod Page.
The category tree is a nested list of checkboxes where each super-category has its sub-categories nested inside of it. You can click on the chevron to expand a category and view its sub-categories.
You can mouse over a category for a tooltip with a description of mods that belong to that category.
The Browse Mods navbar dropdown allows you to quickly browse for all mods in a specific super-category and all of its sub-categories.
You can search for mods in a specific category or categories from the Mods Index. There is a category tree in the filters column from which you can make any selection of categories to filter the results to only mods with those categories.
The category tree on the mods index page behaves slightly differently from the category tree on the Submit Mod and Edit Mod pages in that selecting/deselecting a super-category selects/deselects all children sub-categories automatically.
First, try to find a single sub-category which cleanly and completely describes what the mod does. Ask yourself: "Do the other mods in this sub-category make the same range of changes that this mod makes?"
Second, check any other sub-categories as needed to cover the mod's changes. If you can't find a sub-category which fits the mod's changes, you can check a super-category instead.
Finally, if you have more than 2 sub-categories selected, click the Check Categories button. The system may offer suggestions on redundant categories you can eliminate. Uncheck categories until you have only two categories selected. If you have more than 1 sub-category in the same super-category selected, you can uncheck the sub-categories and check the super-category instead.
The category chosen for a mod affects: