Packed with secrets, Easter Eggs, and hidden characters (and largely predating the Internet), the first few games lent themselves well to an Urban Legend of Zelda or two, and it seemed like just about anything was possible. It had style that passed for maturity at the time, a certain something that more family-friendly games couldn't replicate. In its prime, for about three games, Mortal Kombat was the very essence of cool. The series is defined almost solely by its uber-violence and the odd spelling of its title. It was started and developed over a long time by Midway Games and has since crept out into other media. Mortal Kombat is a long-running series of fighting games.