Complex sentence: Johnny Cage is a fictional video game character from the "Mortal Kombat" fighting game franchise by Midway Games, introduced as one of the series' original seven player characters in the first "Mortal Kombat", and has since become a staple of the series.
Split into simpler sentences: Johnny Cage is a fictional video game character from the "Mortal Kombat" fighting game franchise by Midway Games. He was introduced as one of the series' original seven player characters in the first "Mortal Kombat" game, and has become a staple of the series.