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Crafty.js is a JavaScript game engine that can be used to create HTML 5-powered games. With Crafty.js, your games will be cross-browser compatible allowing any one to play your games on old and modern browsers, including Internet Explorer 9. The open source game engine allow you to build games using canvas or the native DOM, splice and dice a sprite map to easily draw game entities, and use advanced SAT collision detection that can contain more information than just true or false statements.

Phaser is a fast, free, and fun open source HTML5 game development framework. It uses a custom build of Pixi.js for WebGL and Canvas rendering, and supports desktop and mobile web browsers. Games developed with Phaser can be compiled to iOS, Android and native desktop apps via third party tools. With Phaser you can developed games written in JavaScript or TypeScript.

The Unreal Engine is a game engine and suite of tools and technologies developed by Epic Games. The engine was first released in 1998 as a part of the first-person shooter game Unreal, where the game itself was built on the engine. Today the Unreal Engine has grown into an ecosystem that includes a marketplace for game assets that can help indie developer to develop games and make a living selling game assets them selves. The Unreal Engine is free to use and provides a revenue-share model for developers and has been used to tipple A studios and indie developers to create games in almost every genre, including platformers, fighting games,RPGs, MMORPGs, and many more.

CryEngine is an commercial open-source game engine designed and developed by the German game developer Crytek. With CryEngine, game creators can achieve their goals faster by building games on an already proven game engine that provides its full source code. The engine is provided with no up-front cost, only a royalty percentage of 5% of the gross receipt, which makes it perfect for game developers and teams with a low budget or funding. Surrounding the project is a large community and a market place filled with user-made game assets that can be used to increase the speed-to-market.

Unity is a cross-platform game engine and development platform created by Unity Technologies. With Unity game developers can build high-quality 3D and 2D games, deploy them across mobile, desktop, consoles, VR/AR or the Web. Unity was first released as OS X-exclusive game engine but as of 2018 the engine had been extended to support more than 25 platforms.