Mortal Kombat, commonly abbreviated MK, is a series of fighting games created by Ed Boon and John Tobias. The first four renditions and their updates were developed by Midway Games and initially released on arcade machines. The arcade titles were later picked up by Acclaim Entertainment for the home console conversions. Beginning with Mortal Kombat: Deadly Alliance, Midway Games exclusively created home versions of Mortal Kombat up until Mortal Kombat vs. DC Universe. Following Midway's bankruptcy, the franchise was picked up by Warner Bros. in July 2009 and became a part of the Warner Bros. Interactive Entertainment Branch.