Unity was created in 2005, and it is one of the most popular game engines currently, and for good reason. The engine is extremely accessible, especially for independent game developers ("Indie"). This is due to being free unless you make a lot of money off of your game, and being beginner-friendly. Unity games can be 2D or 3D. Unity is also supported on most modern devices, whether it be a gaming console, Windows, Mac, iOS, Android, and more. Despite being beginner-friendly, the engine has many features for more advanced developers, making it a great choice of engine for most projects!