While in the past there were only a handful of large developers who made the majority of the games on the market, with modern technology, there are now hundreds of different developers making games regularly.
A lot of casinos will have a license with particular developers and stick to only providing slots from those teams. Other casinos will then have a wide variety of slots from all different types of developers.
The most popular slots developers are MicroGaming, NetEnt, Play n Go and QuickSpin. Some of the rare developers that only provide games to one or two casinos include Amatic, Endorphina, Blueprint, RTG, Novomatic, Amaya, 1×2 Gaming and Elk Studios to name just a few.
Big Time Gaming