Many years ago, slot machines were just "one-armed bandits" with three reels and a single payline. The advancements in technology have made sure that slot machines have evolved to become the complex and modern machines we can find in casinos nowadays. Today, several slot machine variations are now available, oftentimes with more than three reels and as many as 25 paylines.
Sometimes called "demo" or "practice" games, free slots allow you to play your favorite slot machine games without compromising your bankroll. The only downside is that since it is free, you cannot win any jackpots or prizes. Still, this is an excellent way to practice your slot strategies or simply to get the "feel" of playing the game. If you are hard-pressed for cash or have a limited bankroll, free slots are the ideal games to play in. Most free slot machines possess the same features as "real money" slot machines, only that the former doesn't have any money jackpots.
Traditional slots are just like the original slot machines invented in the late 19th century. These machines have three reels and one payline. You can increase your payouts by playing multiple coins on this slot machine. Five-reel slots, just like the name suggests, have five reels on it, creating more winning combinations than the traditional machine.
Multi-line slots can either be the traditional variety or the five-reel slots. The main difference is that this slot machine has multiple paylines. Video slots have as many as 15-25 paylines. The more paylines, the more coins you have to bet and thus the more money you will spend.
Progressive slots are machines linked to other machines, just like a network. This type of machine offers the greatest amount of jackpots in the gambling industry, mostly in the millions of dollars. Progressive slots have lower payout percentage than traditional slots, but are still tempting to play because of the life-changing jackpots.
Bonus slots as the name suggests are slot machines that gives you a bonus round of play after a win. You can double or even multiply your winnings depending on the type of bonus round involved.
Whatever the type of slot machines you are playing, the basic principles still remain the same, and that is to hit the winning combination in order to win the jackpot. The variations of the slot machine means that people will always continue playing the slots, the casinos continue making money and that slot machine makers will continue looking for ways to improve their machines. In the end, everybody comes out a winner.