Legendary Effects Overhaul (LEO) - Crafting - Drops - Modifications - And More (Updated)

Control legendary drops. Inject custom and Fallout76 effects. Make, separate and swap effects. Optional multiple legendary slots. Everything is fully configurable.

Original address:

Updated on October 2nd:

Version 2.1.3

Pack the loose files into a BA2 compressed package. Since the latest version supports a large number of BA2 archives, this should be a more efficient approach in the long run.

The archive contains 512p textures. Other texture options are loose files.

You can also put loose files with the MLM extension into BA2.

You can also put loose files with the LMA extension into BA2.

Version 2.1.2

Fixed an issue with the FOMOD installer for the MLE extension, which was referencing the wrong file path, a legacy issue from the old installer.

Updated on May 8th:

Version 2.1.0

Portions of the main FOMOD installation package are uploaded as separate optional files to take advantage of the new file-specific requirements. Some people also install the new FOMOD installer specifically.

Consolidated the crafting recipes for the two legendary microchips, as well as talents and material requirements, from separate chip crafting plug-ins to reduce the possibility of optional plug-ins and load order confusion.

The universal ECO extension was merged with the plugin that made the aforementioned legendary microchip crafting recipe available on the ECO universal workbench (utility station), which is yet another one that has been eliminated.

Since I stopped supporting the Legendary Modification Enhancement extension a long time ago, I decided to no longer provide a downloadable version of it. If you want to use it, you must extract it from the archives of a previous version of LEO.

Update April 1st:

Version 2.0.6

Updated AWKCR patch plugin to reflect changes in AWKCR v9.2.0. If you are still using AWKCR v9.1.0, you should not update to this new version of the patch. If you are still using an AWKCR version before 9.1.0, then you do not need this patch at all.

Updated on March 1, 2026:

Version 2.0.5

Contains updated RobCo patch plugin files that were previously accessible as optional updates and are included in the main download

These changed files may not be compatible with the alpha version (anniversary version) of RobCo patcher. If not, there is nothing I can do. RobCo itself needs to be updated.

If you installed the optional update v2.0.4, be sure to uninstall it before installing it

Version 2.0.4

Consider this a test for your friends running the alpha version of RobCo Patcher.

I read that shortened versions of FormID might cause problems in the alpha version, so I replaced them with full-sized ones. Please feedback your results via the posts section.

If the test is successful, I will add the changes to the main installer, as well as update other mods that use RobCo Patcher.

N network Chinese address (now updated to version 2.0.3):

Chinese version 1.9.1 address:

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This mod is part of a series of complementary but independent mods that can be used independently:

[ Equipment and Crafting Overhaul (ECO) ] -|- [ Legendary Effect Overhaul (LEO) ] -|- [ New Equipment Overhaul (NEO) ]

The patch for Fallout London can be found here: Legendary Effects Overhaul (LEO) - Fallout London Edition

Overhaul and expansion of the Legendary system. Fully modular and customizable to your own needs. Every feature can be configured in the blink of an eye via Holotapes or optional MCM.

Legend making and exchange

Craft, dismantle and/or swap all legendary mods the game has to offer, including DLC ​​and tons of custom mods.

Disable crafting recipes so that you can only swap (detach and reattach) effects you find on enemies.

Adds optional 2nd, 3rd, 4th and 5th Legendary Mod slots for armor and weapons.

Fallout 76 armor and weapon legendary effects.

A list of all available effects can be found here.

Controllable legendary effect drops

Inject LEO's custom effects and Fallout 76 effects into the legendary loot pool.

Toggle legendary effect …