Godot Engine - Feature-packed 2D and 3D open source game engine.
GDevelop - GDevelop is an open-source game making software designed to be used by everyone.
Unreal Engine - Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.
Unity - The multiplatform game creation tools for everyone.
Urho3D - Urho3D is a lightweight, cross-platform rendering and game engine implemented in C++ and released...
Orx - Orx - a portable open source game engine