Thunderbolt Casino is adding Diamond Fiesta, a glittering new Mexican slot game from Realtime Gaming, to its huge collection of slots and table games, all played in Rands. Two special features will result in loco payouts. “Expanding Reels” increases chances for a winning combination. And Day-of-the-Dead Skulls win free spins with extra Scatters, Wilds and Diamonds. The spicy new game arrives just in time for Mexico’s annual Cinco de Mayo celebrations.