Intrinsic is described as 'General Features Capable WYSIWYG editor IntrinsicEd Fully multithreaded renderer and engine core Data oriented engine design and data driven rendering process, inspired by the great blog posts of the Bitsquid/Stingray team  Hot reloading of textures'. There are more than 10 games similar to Intrinsic for a variety of platforms, including Windows, Linux, Mac, Xbox and Android. The best alternative is Godot Engine, which is both free and Open Source. Other Intrinsic like games are Unity (Free Personal), Unreal Engine (Free), CRYENGINE (Free Personal) and Torque 3D (Free, Open Source).
Godot is a fully featured, open source, MIT licensed game engine. It focuses on having great tools, and a visual oriented workflow that can export to PC, Mobile and Web platforms. It is a cross-platform 2D and 3D game engine and game development IDE.
Unreal Engine is a professional suite of tools and technologies used for building high-quality games across a range of platforms. Unreal Engine’s rendering architecture enables developers to achieve stunning visuals and also scale elegantly to lower-end systems.
Stride (formerly Xenko) is an open-source C# game engine designed for the future of gaming. It comes with a full toolchain and is especially well suited to create realistic games but allows you much more!.
OGRE (Object-Oriented Graphics Rendering Engine) is a scene-oriented, flexible 3D engine written in C++ designed to make it easier and more intuitive for developers to produce applications utilizing hardware-accelerated 3D graphics.
Pygame is a set of Python modules designed for writing video games. Pygame adds functionality on top of the excellent SDL library. This allows you to create fully featured games and multimedia programs in the python language.