High Quality Content by WIKIPEDIA articles! Native American gaming refers to casinos, bingo halls, and other gambling operations on Indian reservations or other tribal land in the United States. Because these areas have tribal sovereignty, states have limited ability to forbid gambling there, as codified by the Indian Gaming Regulatory Act of 1988. According to Indian Gaming CPA Firm Joseph Eve`s 2012 Indian Gaming Cost of Doing Business Report, average revenues of Indian Casinos across the United States is at about US $77 million.