Complex sentence: On the way Simon sees that all the the walls of the facility are filled with some kind of black organic substance, and he also meets a robot that thinks it's human, and numerous other robots that are hostile against him.
Split into simpler sentences: On the way Simon sees that all the the walls of the facility are filled with some kind of black organic substance. He meets a robot that thinks it's human as well as numerous other robots that are hostile against him.