In total, it has released over 1,000 different IGT slots and other types of online casino games that do not need to be downloaded. Today the company is one of the most famous developers and distributors of gaming software in America, Europe, Australia and other countries. IGT initially was a small firm that specialized in the computerization of land-based casinos. International Game Technology ( IGT) is a worldwide gaming software manufacturer headquartered in Las Vegas, Nevada and Reno.