All the Types of Slot Machines Explained

Slot machines have come a long way since the first mechanical reels. Whether you're new to online gaming or a seasoned casino gaming player, understanding the different types can make the whole experience more enjoyable and help you find games that suit your playstyle.

At Virgin Games, we've got over 900 online slots to spin through – with a wide range of different types available - so we thought a proper breakdown was in order. Here's every main type of slot machine explained, online and land-based, so you know exactly what you're spinning before you hit the button.

Classic Slots (3-Reel Machines)

The original. Classic slots are built on the traditional slots setup of three reels, using familiar symbols like cherries, bars, and 7s. Simple paylines, no complicated bonus rounds. Land matching symbols across a payline to form winning combinations, and that's your win. Just spin and see what lands.

Land-based versions of these machines (sometimes called fruit machines or one-armed bandits) were the backbone of casino floors for decades. Online, they've been faithfully recreated with the same clean setup. If you want a no-fuss spin and a feel for how slots started, this is the one.

At Virgin Games, 7's Deluxe is a solid example of a classic slot: three reels, classic symbols, and a pace that doesn't demand much of you. Perfect if you're finding your feet, or just looking for something that gets out of its own way.

Video Slots (5-Reel Machines)

The most common type of online slot you'll find today, and the one with the most going on. Video slots typically run on five reels, with multiple paylines, vivid themes, and bonus features that go well beyond the base game. Free spins, expanding Wilds, multipliers, re-spins. The slots feature collection in this category is extensive.

Unlike their land-based counterparts, video slots online can pull from almost any theme imaginable: ancient civilisations, mythology, pop culture, fantasy worlds. The digital environment allows for animation, layered soundscapes, and bonus rounds that feel like a game within a game. (We'll take it.)

Gonzo's Quest is a popular example of Virgin Games, using an Avalanche mechanic where symbols drop into place rather than spinning, creating chain wins from a single round. One spin, multiple results. Not a bad deal.

If you're looking for something with a bit more edge, Book of Dead is a high volatility slot worth knowing. It's an Egyptian-themed video slot from Play'n GO where Scatter symbols double as Wilds. Land three or more, and you'll unlock the free spins bonus, where a randomly chosen symbol expands across the reels. The game features are what give it its reputation.

Megaways Slots

Megaways is a mechanic developed by Big Time Gaming that changes the number of symbols displayed on each reel with every spin. More symbols on the reels means more ways to win. In some games, up to 117,649 or even 248,832 paylines on a single spin. (Yes, that many).

It's one of the most significant developments in online slot design, and dozens of leading providers have licensed the mechanic to use in their own games. The unpredictability of how many ways are in play on any given spin is a big part of what makes Megaways so popular.

At Virgin Games, Big Bass Bonanza Megaways and 9 Pots of Gold Megaways are among the standout options when it comes to Megaways slots, both combining the Megaways structure with their own distinct bonus features.

Cluster Pays Slots

Instead of traditional reels and paylines, cluster pays slots use a grid. Win by landing a group (or cluster) of matching symbols anywhere on the board, with usually five or more adjacent symbols needed to form a win. When a winning cluster lands, those symbols disappear, and new ones cascade down, potentially setting off further wins from a single spin.

NetEnt introduced the mechanic in 2016 with Aloha! Cluster Pays, and it's grown steadily since. If you want a deeper look at how these games work and which ones to try, our guide to cluster pays slots covers it in full.

On Virgin Games, Rise of Atlantis and Secrets of the Phoenix Elements Jackpot are two cluster pays slots worth exploring, both offering the cascade mechanic alongside their own bonus game structures.

Progressive Jackpot Slots

Progressive jackpot slots are linked across a network, with a portion of every stake contributing to a shared prize pool that grows until it's won. The jackpot resets to a minimum value after it drops, then starts climbing again.

These are available in both land-based casinos and online, though online networks tend to grow much faster given the volume of players.

At Virgin Games, the Jackpot King series from Red Tiger connects across the network with a bonus game triggered by landing five Jackpot King overlay symbols. From there, you collect crowns to progress towards the jackpot. Deal or No Deal Megaways: Jackpot King adds the Megaways mechanic into the mix, with up to 117,649 paylines, plus a bonus round involving the Banker. (Yes, that Banker.)

We also offer Daily Jackpots across games like Jewel Scarabs and Mystery Reels: progressive prizes that must drop within a set window each day.

And if you want a jackpot feature on a slot game that doesn't already have one, that's where Jackpot Blast comes in. It's a Virgin Games exclusive: opt in for an extra 10p per bet and a progressive prize could trigger at random across four tiers, without touching the base game at all. Jackpots, your way.

Penny Slots

Penny slots let you spin from as little as 1p per line, making them a good entry point for anyone just starting out playing slots at their own pace. The lower bet sizes mean you can explore different games and get comfortable with how they work without committing to larger stakes.

Most penny slots follow classic or video slot structures, with straightforward base game mechanics. Cleopatra is one of the most popular penny slots on our online casino site: spin from 1p, with a bonus round that can award up to 180 free spins. Not a bad return on a penny. For more on low-stake options and which games are available, take a look at our penny slots guide.

Land-Based vs Online Slots

Land-based casino slots and online slots share the same core mechanic. An RNG (random number generator) determines the outcome of every spin, ensuring results are entirely random and fair. The main differences are access, variety, and features.

On the casino floor, you're working with whatever machines are available. Online, the range is considerably wider: different game types, themes, volatility levels, and bonus structures, all in one place.

For a full comparison of how they stack up against each other, our online slots vs casino slots guide goes through the key differences in detail.

Which Types of Slots Are Best to Play?

There's no single answer here. The best types of slots to play come down to what you're looking for. Classic slots suit players who prefer something pared back. Video slots offer more variety and feature-rich gameplay. Megaways and cluster pays bring more to each spin. Progressive jackpots have larger prize pools on offer. Penny slots let you play at a lower stake.

At Virgin Games, all of our slots are available in demo mode, so you can try any game before playing with real money. It's a good way to get a feel for how each type of slot machine game plays before deciding what suits you.

And if you'd rather play on your phone, the Virgin Games mobile app is free to download on iOS and Android. It comes with the full catalogue: every slot available on the website is available in the app. No stripped-back version, no compromises. Your balance syncs across desktop and mobile, too, so you can pick up exactly where you left off.

Browse the full range at our online slots page. Over 900 games, all in one place. Something will click, Virgin style.

Over 900 online slot games and counting. From classic three-reelers to Megaways, cluster pays, and daily jackpots - there's a type of slot for every kind of player at Virgin Games. Try any game in demo mode, set your limits, and play your way. Join now.

All offers mentioned correct at the time of writing but may be subject to change.