Single Line Slots – These are the classic slots, consisting of three reels and one pay-line. They date back to the early 1900′s when they were set up in gambling halls, casinos and even grocery stores as simple entertainment for the ladies who had accompanied their husbands. The payoffs were in gum, small candies, and later, in nickels. The term One Armed Bandits came to be because of the lever located on the right side of the machine. The object was simple – to pull the lever, and see if you won. Your winnings would fall into the tray on the front of the machine.

Bonus Slots – Bonus Slots came along quite awhile after Single Line Slots. As their name implies, Single Line Slots offer one or more bonus rounds in addition to the regular slot game. The triggers for the bonus round will vary from game to game, but in essence, when you trigger the bonus, you’re taken to a secondary screen to play out the round by choosing from several objects which will reveal a prize, or in some cases, nothing. After the bonus round is complete, you are taken back to the original game.

Feature Slots – Feature slots add different components to increase the challenge in a standard slots game. These components consist of Wilds, Scatters, Multipliers or Bonus Rounds. Feature Slots are usually multi-line slots, but that isn’t’ always the case. The features in these games usually allow you a chance at winning more cash or free spins, thus giving you free chances to win with multiplied winnings.

Multi Line Slots – Multi Line Slots have more than one pay-line, and in most cases, more than three reels. It’s not uncommon for there to be up to nine reels and over forty pay-lines on some of these games, although the vast majority online have five reels and approximately twenty pay lines. You’ll also find that many Multi Line Slots offer features, bonus rounds and progressive jackpots.

Progressive Slots – These are the big boys of online slots, as they offer mega-jackpots. Progressive Slots are tied to all the online casinos using the same casino software. When one jackpot is hit, the game is reset at all the participating casinos. Progressive Slots can be Single Line or Multi Line Slots, and in many cases they offer Bonus Rounds and Features.

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