The engine is created in the Multimedia Fusion 2 software. Making an engine is one of the most tedious parts of the game creation process, especially with a Sonic game, so Worlds provides a pre-made engine with a basic set of objects and features in order to allow designers to mainly focus on level design.ĭue the collaborative nature of this project, everyone can freely use this pre-made engine, modify it and submit additions to the official releases to enhance the quality of the engine.