Bally is one of the oldest American  slot developers and were around before 1979 when they first entered the gaming scene as BallyTechnologies Inc. They are now owned, like WMS and Barcrest, by Scientific Gaming. Their portfolio includes Thunderhorn, 88 Fortunes and more recently the Michael Jackson slot. They are probably best known in North American land-based casinos for the ‘Quick Hit Platinum’ series of slots, some of which made it to the online casinos.  A full list of Bally slots and RTP figures can be viewed here: