Complex sentence: The enemies in Enter Electro are more realistic than the ones found on the previous game, which featured some criminals, lizardmen and alien symbiotes, on the second game all the enemies are criminals and robots.
Split into simpler sentences: The enemies in "Enter Electro" are more realistic than the ones in the previous game, such as criminals, lizardmen and alien symbiotes. In the second game all the enemies are criminals and robots.