Unreal Engine is described as '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' and is a very popular game development tool in the development category. There are more than 100 alternatives to Unreal Engine for a variety of platforms, including Windows, Linux, Mac, Web-based and Android apps. The best Unreal Engine alternative is Godot Engine, which is both free and Open Source. Other great apps like Unreal Engine are Unity, GDevelop, Redot Engine and Defold Engine.
If you like playing 3D games, you might like to create your own game with custom scenes, characters, weapons and design your own gameplay. Silent Walk FPS Creator is a tool which helps you design and build your dream 3D game - without a single line of code!
FPS Creator sets a new benchmark in the game creation market by providing an easy-to-use yet highly flexible editing environment. As its name implies this is a tool for creating action-packed FPS games with no programming or 3D modelling knowledge required.
An unofficial client to install Unreal Engine, download and manage purchased assets, projects, plugins and games from the Epic Games Store.
Whitestorm.js is a framework for 3D web apps built with Three.js technology. It implements a core for fast development of a 3D scene with physics.
Amulet is a free Lua-based audio/visual toolkit suitable for small games and experimentation. It runs on Windows, Mac, Linux, HTML5 and iOS.
Limon is a multi platform 3D game engine mainly focusing on first person games. Focus of its development is ease of use and ease of study. It has builtin editor for maps, animations and GUIs.
GameSalad Creator is an authoring tool developed by GameSalad, Inc. (formerly Gendai Games) aimed primarily at non-programmers for composing games in a drag-and-drop fashion, utilizing visual editors and a behavior-based logic system.
A cross-platform 2D game prototyping framework based on OpenGL and C++.
Angel balances the speed and flexibility of native code with an eye towards rapid iteration and out-of-the-box functionality. In a world of web games and memory-managed scripting engines, sometimes you still.
Project Spark is a powerful, yet simple way to build and play your own worlds, stories and games.
Reality Factory 2 is a next-generation game authoring suite. It combines a flexible, fully scripted game development environment powered by Python with the Ogre3D engine, and supports all major desktop operating systems.
LittleJS is a fast lightweight open source HTML5 game engine for modern web development. Its small footprint is packed with a comprehensive feature set including hybrid rendering, physics, particles, sound effects, music, and input handling.
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This is more a game than a game engine.