The first online casinos appeared in the late 1990s, but slots with an Indian theme didn't start to become popular until the early 2000s. Slot machines with regional themes, symbols, and storylines were introspin gameduced after developers realized they could make games that appealed to Indian players. The sophistication of Indian slots increased along with the growth of the online gaming industry. The design & gameplay mechanics of these games were initially straightforward. But as technology developed, programmers started adding increasingly intricate elements like progressive jackpots, bonus rounds, and multiple paylines.