That year, casinos were fully legalized throughout most of the state, making Nevada the first US territory with a regulated gambling industry. In 1909, the state instituted a prohibition, which lasted until 1931. Gambling in Nevada was decriminalized in 1869. In total, the local land-based NV casinos offer more slots and table games than all the casinos from all the other states combined. Nevada has a massive gambling industry that generates close to $11 billion in revenue on an annual basis.