Dialogue plugin for Unreal Engine with its own dialogue tree graph editor and a validation system that flags broken graphs before runtime. Per-node Decorators, written in Blueprint, trigger side effects such as cutscenes or camera switches from within a conversation. Licensed MPL-2.0, a file-level copyleft: commercial use is allowed, but changes to the plugin's own files must stay available as source.
At a glance
Licence
MPL-2.0
Commercial use
commercial OK
Credit
Not required
Status
active: License spot-checked at the source; the entry carries dated evidence.
MPL-2.0 is not GPL or LGPL, but it is copyleft at the file level: if you modify Mountea's source files and distribute the game, those modified files must be made available under MPL-2.0; your own game code that merely uses the plugin is not affected
The Unreal Engine EULA forbids combining engine code with licences that require source disclosure, naming GPL, LGPL and CC-BY-SA as examples; MPL-2.0 is not named, and an unmodified plugin raises no disclosure question, but a team that plans to patch the plugin should check this with counsel before shipping
Engine support: the README support table lists UE 5.2 to 5.5 as supported (5.1 partial, 4.26 to 5.0 deprecated), and the GitHub releases add builds tagged 3.0.5.56, 3.0.5.57 and 3.0.5.58 for 5.6 to 5.8 (the last published 2026-06-27); the .uplugin on master declares "EngineVersion": "5.7.0"
Install from a GitHub release zip into YourProject/Plugins, or from the Marketplace/Fab listing linked in the README; the README points to a wiki Getting Started guide and a tutorial video playlist
Graph-based like DlgSystem, with a stronger editor-side validation story; SUDS is the text-script alternative
Maintenance: GitHub API (2026-10-13) reports the repository not archived, last push 2026-10-05
Evidence
LICENSE in the repository, master branch (2026-10-13): "Mozilla Public License Version 2.0"
GitHub API repository metadata (2026-10-13): licence detected as MPL-2.0
README.md, master branch (2026-10-13): support table rows "UE 5.2" to "UE 5.5" marked supported