Pygame
Pygame is a set of Python modules designed for writing games.
19 Alternatives To Pygame
Adventure Game Studio
Adventure Game Studio provides the tools to make your own adventure, for free!
BYOND
BYOND is the premier community for making and playing online multiplayer games.
Blender
Blender is the open source, cross platform suite of tools for 3D creation.
Corona SDK
Cross-platform mobile app development.
CryENGINE
The most powerful game development platform is now available to everyone. Full engine source code.
GDevelop
GDevelop is an open-source game making software designed to be used by everyone.
Grit Game Engine
The Grit Game Engine is an MIT-Licensed Open Source Game Engine that is highly scriptable via Lua.
LOVE
Hi there! LÖVE is an awesome framework you can use to make 2D games in Lua.
Orx
Orx - a portable open source game engine
Polycode
Polycode is a C++ and Lua framework for building interactive applications.
Qt
C++
RenPy
Ren’Py is a free and cross-platform visual novel engine that helps you use words, pictures, and…
Torque 3D
Torque 3D is a easy-to-use game creation platform.
Unity
The multiplatform game creation tools for everyone.
Unreal Engine
Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.
Urho3D
Urho3D is a lightweight, cross-platform rendering and game engine implemented in C++ and released…
irrlicht
This caused the Irrlicht homepage and forum to work badly. Over the last days most things started working again – except the forum continues to be broken. Old posts can be read but everything else is currently not working.
pyglet
Cross-platform windowing and multimedia library for Python.