The Unity engine 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 had been extended to support more than 25 platforms. The engine offers a primary scripting API in C#, for both the Unity editor in the form of plugins, and games themselves, as well as drag and drop functionality. It also features an integrated editor which can be used to develop game assets such as levels and 3D models. The engine has been adopted by a number of major studios and independent developers.
There is no one answer to this question as different people will have different opinions. However, some of the more popular games made with Unity include Temple Run, Bad Piggies, and Super Mario Run.
The Unity engine is a versatile tool that can be used to create a wide variety of games. From small indie games to AAA titles, Unity has been used to create some of the best games in recent years. If you're looking for a game engine to create your next game, Unity is a great option to consider.