This research overviews a projection about the Cost of Revenue of Churchill Downs, Dover Downs Gaming & Entertainment, Iao Kun Group Holding Company and other Gaming Companies companies worldwide between the years 2012 to 2015. In the last period, 2015, the largest presented player is Scientific Games with Cost of Revenue of 1.1B. The fastest growing participant in our report is Scientific Games with 113.02% growth in Cost of Revenue over 4 years between 2012 to 2015. The topic that suffers from the biggest downturn is Dover Downs Gaming & Entertainment with 18.78% decline over the same period. This report represents data points consolidated from 4 sources: Dover Downs Gaming & Entertainment, Trans World, Churchill Downs and Scientific Games