Quack is a Dialogue Tree System built to work with GameMaker Studio 2. It provides an online editor, and a GML extension. It is designed to work with a variety of dialogue systems such as Friendly Cosmonaut's Dialogue System
Quack is great for building visual novels in GameMaker or complex branching dialogue trees in RPG games in GameMaker.
Visit the Quack website for instructions**
End User Licence Agreement (EULA).