Slot machines, sometimes known as "one-armed bandits," are one of the most widely played types of gambling in both online and land-based casinos. The basic idea behind these games is straightforward: players spin reels with different symbols in the hopes of aligning them in winning combplay slots with real moneyinations. From mechanical machines with real reels to complex digital interfaces that provide a wide variety of themes, features, and gameplay styles, slot game mechanics have changed dramatically since their inception. A slot game's basic design usually consists of three to five reels and a predetermined number of paylines. Paylines are the lines that a player must land a winning combination of symbols on in order to be paid. In order to increase the possibility of winning combinations, modern slot games frequently have multiple paylines—sometimes even more than 100.