Complex sentence: There are four huge maps totalling over 20,000 screens, with a wide range of environments such as elven forests, a demon wasteland, farmlands, towns, fortifications and extensive sewer systems.
Split into simpler sentences: There are four huge maps totalling over 20,000 screens, with a very wide range of environments. For instance there is an elven forest, a demon wasteland, farmlands, towns, fortifications and extensive sewer systems.