Fallout 4 modding for the first time: mod managers, Nexus Mods and settings
This guide is for anyone who has never installed a mod for Fallout 4 and wants to start without breaking their game. You will end up with a mod manager set up properly, a small working mod list, and an understanding of why certain settings matter before you add more.
None of the steps below are difficult once you know why each one matters.
Why use a mod manager instead of copying files by hand
You can technically drop mod files straight into the game’s Data folder yourself. Plenty of old guides still describe this. The problem is that you lose track of what you installed, in what order, and how to remove it cleanly if something breaks.
A mod manager such as Vortex or Mod Organizer 2 keeps every mod in its own folder and tracks which files belong to which mod. If a mod causes a crash, you disable it in the manager and the game goes back to how it was. Doing the same thing by hand means hunting through folders trying to remember which files came from where, which gets messy fast once you have more than a handful of mods installed.
Both tools also check for conflicts between mods, something that is almost impossible to spot by eye when you are copying files manually.
Getting mods from Nexus Mods
Download mods from the author’s own page on Nexus Mods rather than from random links elsewhere. The page will usually tell you what the mod needs to work, such as other mods it depends on, and any known issues. Read that information before installing, not after something goes wrong.
Most mod managers can link directly to Nexus Mods so you can download through the manager itself, which saves you from manually finding the downloaded file and importing it.
Archive invalidation and why it matters
Many Fallout 4 mods use loose files rather than packed archives. For the game to actually load these loose files instead of ignoring them in favour of the default packed data, a setting called archive invalidation needs to be switched on in the game’s ini files.
Doing this by hand means editing ini files directly, which is easy to get wrong if you are not used to it. A mod manager sets this for you automatically when you set it up, so loose-file mods work the moment you install them. This is one of the main reasons new modders should not skip the manager step.
Enabling plugins and load order
Mods that add new content usually come with a plugin file. These plugins need to be switched on, or “enabled”, before the game will read them. An unenabled plugin just sits there doing nothing, which is a common reason a newly installed mod seems to have had no effect.
Your mod manager will show you a list of enabled plugins along with their load order, which is the sequence the game reads them in. Load order matters when two mods try to change the same thing, since whichever loads later usually wins. The manager will flag obvious conflicts, but it is still worth reading mod pages for any advice the author gives about where their mod should sit in the order.
Start small and test as you go
Install a handful of mods first, load the game, and play for a while before adding anything else. This makes it far easier to work out which mod caused a problem if one shows up, since you are not sifting through dozens of changes at once.
- Install your mod manager and let it set up archive invalidation for you.
- Add two or three mods from Nexus Mods and enable their plugins.
- Check the load order the manager suggests and leave it as is unless a mod page says otherwise.
- Launch the game and play enough to confirm nothing crashes or looks broken.
- Add a few more mods, repeating the testing step each time.
Resist the urge to install twenty mods on day one. Problems are much easier to trace when you add things gradually.
Back up your saves first
Before your first modded session, copy your existing save files somewhere safe, such as an external drive or a separate folder outside the game’s save directory. Mods can occasionally corrupt a save or make it unstable, and having an unmodded backup means you never lose progress permanently.
This takes a couple of minutes and is the single easiest way to protect yourself against a bad mod ruining hours of play.
If something goes wrong
If the game crashes on launch or in menus, disable your most recently added mods first and try again. This narrows down the culprit quickly.
If a plugin will not enable or the manager flags a missing requirement, check the mod’s page again for anything you skipped, such as another mod it depends on.
To undo any mod, disable it in the manager rather than deleting files manually. This keeps your Data folder clean and lets you turn it back on later without reinstalling.
Keep a short note of which mods you have installed and in what order you added them. It takes seconds to write and saves real time the next time something needs fixing.
