Rive 2 Flutter Runtime. This package provides runtime functionality for playing back and interacting with animations built with the Rive editor available at https://rive.app.
flame
A minimalist Flutter game engine, provides a nice set of somewhat independent modules you can choose from.
Flutter Unity 3D widget for embedding Unity game scenes in flutter. This library now supports Unity as a Library.
bonfire
(RPG maker) Create RPG-style or similar games more simply with Flame.
spritewidget
SpriteWidget is an open source toolkit for building complex, high performance animations and 2D games with Flutter.
A 2D physics engine for Dart, also works with the Flame game engine in Flutter
tiled
A Dart Tiled library. Parse your TMX files into useful representations. Compatible with Flame.