Card and chance games occupy a broad spectrum from predominantly skill-based contests to almost pure lotteries. Rummy and its digital cousin often branded as OKRummy sit closer to the skill side, rewarding planning and memory. Aviator, a modern multiplier “crash” game, leans toward chance with fast decisions and high volatility. Understanding how each game works, the skills they demand, and the risks they pose helps you participate more thoughtfully and responsibly. Rummy refers to a family of card games whose central goal is to form melds—sets of equal ranks or runs of consecutive cards in a suit—while minimizing unmelded “deadwood.” In the common draw-and-discard form, players draw from a stock or the top of the discard pile, then discard one card to end their turn. The hand ends when a player “goes out” by melding all cards (or all but one) and lays them on the table. Scoring typically awards points for melds and subtracts points for deadwood