The $1,200 threshold also applies to any cash prizes won in casino tournaments or drawings. If you win a jackpot in Mississippi casino of $1,200 or more, the Indiana casino will keep 3% of your winnings as tax for the Mississippi Department of Revenue. Just click here to see a see a list of slot machine payback statistics for all Mississippi casinos. Slot Payback Statistics For Tunica Casinosīy state law, Tunica casinos must release all payback percentages on electronic gaming machines to the public. All casinos in the area offer: blackjack, craps, roulette, baccarat,slot machines, video poker, and video keno.All casinos in Tunica are open 24 hours a day.All Tunica casinos are riverboat casinos which remain dockside and do not cruise.Click on the name of any casino to see a page of detailed information about that particular casino.