writes "Godot is a fully featured, open source, MIT licensed, game engine. It focuses on having great tools, and a visual oriented workflow that can deploy to PC, Mobile and Web platforms with no hassle. The editor, language and APIs are feature rich, yet simple to learn. Godot was born as an in-house engine, and was used to publish several work-for-hire commercial titles.
With more than half a million lines of code, Godot is one of the most complex Open Source game engines at the moment, and one of the largest commitments to open source software in recent years. It allows developers to make games under Linux (and other unix variants), Windows and OSX."Link to Original Source