Developer toolset for making Mass Effect Legendary Edition and Mass Effect Trilogy mods

Legendary Explorer 6.3

July 23, 2023

View on NexusMods
Download stable release
44 MB
Suggest new features and report issues on the ME3Tweaks Discord
View source code on GitHub

Build your mods with the power of ME3Tweaks.

You can also download Legendary Explorer, stable and nightlies, directly from within ME3Tweaks Mod Manager. Nightlies contain the most bleeding edge features and bug fixes. Select which one you want from the tools menu.


Legendary Explorer has a large set of tools to help you accomplish what you need.

Package Editor

Package Editor is the main editor that developers use to edit the toolset.

The main editor tool for the series, Package Editor lets you modify textures, meshes, sound, properties, and more all within a single window, with the file shown in its logical heirarchy.

With multiple subtools to get the job done, Package Editor is the premiere tool to use for modding.

Asset Database

In order to create mods, you need to typically edit existing content, and Asset Database is the best tool for quickly finding what you need.

Specialized Editors

In addition to Package Editor, Legendary Explorer has multiple tools dedicated to specific workflows.

Sequence Editor

Modify kismet sequences to create your own flow of the game, from conversations to combat. Trace kismet execution with the Kismet Logger ASI to help debug issues.

Pathfinding Editor

Edit pathfinding networks to allow movement from non-player characters. Move, add, or remove level objects to customize the world.

Dialogue Editor

Modify conversations with easy with Dialogue Editor, including interrupts and charm/intimidate requirements, FaceFX, and audio.


Listen to audio from all games. Replace audio quickly and easily in Mass Effect 3, Mass Effect 2 LE, and Mass Effect 3 LE without having to use the Wwise authoring interface.


View and replace meshes with Meshplorer. You can also export meshes for editing with external tools such as Blender.

System Requirements

Required Software

  • Mass Effect for modifying Mass Effect files
  • Mass Effect 2 for modifying Mass Effect 2 files
  • Mass Effect 3 for modifying Mass Effect 3 files
  • Mass Effect Legendary Edition for modifying Mass Effect Legendary Edition files
  • Microsoft .NET 7 - Windows x64 runtime

Supported OS

  • Windows 10 64-bit
  • Windows 11 64-bit

We recommend a minimum of 8GB of RAM to run the toolset.