Visit almost any good-quality casino on the worldwide web, and one of the first things you’ll see is an abundance of online slots. The titles and logos offer tantalizing clues about the themes, but the differences between them run much deeper than whether the action is set in ancient Egypt or in a futuristic floating city.

Themes are important, of course, but the structure and features of those top 5 Aussie pokies games usually are more important considerations for players looking for reels to spin for chances to win. All those hundreds if not thousands of slot games fit into one of three categories, and it the structure and features that determine which of those categories they belong to.

Classic Slots Online

When Charles Fey invented the first slot machine in the early 1900s, he used lucky symbols such as stars, diamonds, and the Liberty Bell; the latter symbol giving the 3-reel machine its nickname. It was not long before rival manufacturers developed machines of their own. Some of them featured fruit symbols and paid out gum in the flavour of the fruit symbols that formed winning combinations.

Those early symbols are still associated with the genre, and they are still used in the classic online slot category. Games in the category also stick to the original format of 3 reels and a single payline. However, some titles add a bit more magic by including a Wild symbol that can substitute for others, or a Bonus symbol that awards Free Spins.

Video Slots Online

The online video slot category is not only the largest of the categories, it is also the most popular and the most diverse. The style developed in the 1970s, when video screens and basic bonus features were added to electrified slot machines.

The category grew in leaps and bounds from the mid-90s onwards. Thanks to leading software providers, the genre took on more of the look and feel of video games. Most titles now include a storyline that plays out in animated clips and special effects, and that is reflected by the reel symbols.

Video slots also include various special features such as Wilds and Scatters, Free Spins, Multipliers, cluster win mechanisms, themed mini-games, and even skills-based elements.

Jackpot Slots Online

The world’s first progressive jackpot slot machine, MegaBucks, was launched by International Game Technology in 1986, and it was an instant hit. After all, how many players in that decadent decade could resist a jackpot that increased in size with every bet placed?

The same principle is used in online slots with progressive jackpots, although this can be done in different ways. Some titles have a unique jackpot, while others are connected to a network.

In the case of the latter, a portion of every bet placed on every game connected to the network feeds the seed amount. This also means that every one of those titles offers the same jackpot. Either way, the jackpots offered by in that category can be worth millions.