Unity is a cross-platform game engine developed by Unity Technologies, first announced and released in June 2005 at Apple Inc.'s Worldwide Developers Conference as an OS X-exclusive game engine. As of 2018, the engine has been extended to support 27 platforms.
I have started a video tutorial on A Complete Game Development course using Unity3d on YouTube. It is completely a beginner to advance course so any on can visit and learn to code and design game from beginning.
Course will be updated daily.
Visit here for more information.
https://www.youtube.com/channel/UCJjDIEeBxUT8VxBVnMXHkDQ