GameStudio is quite dead. The last beta released was from 2015 ... two years ago. The engine is quite dated, though it could indeed be used to make "decent" games. However, what really gets in GameStudio's way is the editors. WED is terrible to work in and MED is even worse. Both Unity and Unreal have really nice, modern editors that help bring development of a game together. Conitec (and no oP Group) seemed reluctant to actually ever change WED and MED. In a sense, we are still working with editors from the days of Quake, with some updates.