Classic slots are retro slot machines-inspired online casino slot games. They tend to have three reels and only one to five paylines; and you'll rarely encounter bonus features or complex mechanisms within this type of game.

Besides the mechanism and gameplay, classic slots are designed with retro slot elements. You'll often notice symbols used in many old slot machines, such as fruits, 7s, bars and bells.

With the development of slot games, developers have also been launching classic slots with modern twists. So now, they'll have some innovative features, more paylines, or creative designs that can compete with newer slots.

Some perfect examples of classic slots still popular among UK players include Mega Joker from NetEnt, Double Diamond by IGT and 7s on Fire by SG Digital.

Video slots are slots that are more layered in design and gameplay. They usually have grand decorations, such as animations, mascots, fleshed-out characters, cut-scenes, and more. They're also often thematic, with a fun soundtrack accompanying the theme.

Most video slots offer features throughout the gameplay, such as bonus games or features players can find on the base game.

With developers constantly releasing creative ideas, players can enjoy new gameplay on video slots. Unlike classic slots, video slots generally have five reels across.

The most renowned video slots include King Kong Cash, The Goonies and Rich Wilde and the Book of Dead.

Progressive jackpot slots are a type of jackpot slot where the pot prize amount isn’t fixed. The jackpot amount changes depending on how many players have played and bet on the slot.

When you play progressive slots, a percentage of your stake goes into the jackpot. This makes progressive jackpot slots exciting as the pot can grow into a massive one, worth tens of millions. Once a player wins the pot, the prize amount is reset to the developer’s 'seed prize,' a set starting point amount that differs for each game.

Mega Moolah and its variations are the most famous examples. However, Age of The Gods and Aztec Millions are well-liked and commonly found in many online UK slot sites.

Online slots use 'lines' or paylines to determine when the player hits a win. Some slots, like classic slots, come with a single payline, which means if the reels land matching symbols on where the line is, the player receives a payout according to the value of the winning symbol.

Multi-line slots are games with more than one payline. The number can go up to thousands, but the most common slots in the market currently have 20 to 100 paylines in play. Some slots also allow players to activate or deactivate the lines according to their preferences.

A long list of multi-line slots are currently popular, but Gonzo's Quest, which offers 20 paylines, is one of the most well-known titles. Rainbow Riches and Wolf Gold are also popular multi-line slots you can easily find in most UK online casinos.

The Megaways mechanic was created by Big Time Gaming, now owned by Evolution Gaming. This particular mechanic allows thousands of potential payline wins, up to 117,649 ways to win, instead of the standard 20 paylines you often come across on traditional slots.

Megaways offers more ways to win inside the paylines and this feature has since been added to a lot of popular titles, enhancing gameplay on traditional favourites such as Big Bass Bonanza Megaways.