Unigine is a performance driven engine which is capable of delivering rich-end tools and features for developers to achieve their projects using advanced 3D graphic enhancements. There has to be something on your side if you can't install, run, build and configure the engine. Please read all the instructions which comes with the evaluation kit in order to establish a good functionality. Also, the rating was established based on the successful projects that were achieved with Unigine and the projects can be consulted from the Showcase gallery. Likely, it's a 5-star kit based on the projects that can be accomplished with it.