- Online slots share a few common features: spinning reels, paylines, and symbol matching.
- Wild and scatter symbols unlock more winning combos and bonus features, respectively.
- Bonus features like extra spins or jackpots offer a chance at exponential payouts.
Slot games are incredibly popular and highly entertaining, with action-packed gameplay that makes every spin a thrilling adventure. There are thousands of games to choose from, each offering unique features designed to maximize the fun factor.
The best online slots keep players engaged with diverse features that enhance the experience. These include custom reel setups, special slot wild symbols, extra rounds with stacked jackpots, and more. If players want to make the most of these game-changing mechanics, keep reading for a thorough online slots guide covering key features of slot game design, including modern additions such as cascading reels, expanding wilds, and pick-and-click mini-games.
How Do Slot Machines Work?
All online slots work in a similar way. For starters, the base game is generally a grid of reels and rows of symbols. The size and shape of this layout vary by game, but it’s typically a predetermined set of vertical columns (reels) and horizontal rows. Win rate is described by return to player (RTP), and volatility also plays a role in wins.
Reel Types
The number of online slot reels gives a good indication of what to expect in terms of gameplay. Three reels are often the standard setup for classic slots with no or fewer features, while larger setups are more common in modern slot variations and typically offer more variety in terms of gameplay.
There are also special reels like expanding reels and cascading reels. Expanding reels add rows of symbols that can be unlocked during the base game. Cascading reels, also known as tumbling reels or avalanche reels, replace all winning symbols with new ones, repeating the process until no additional matches form.
Paylines
When the reels spin, random number generation (RNG) ensures that every outcome fills the grid with random symbols. Wins are achieved by landing matching sets of pay symbols. Each game has paylines that award wins based on specific payline patterns, typically triggered from left to right across the reels, but a few titles may work in slightly different ways, such as both left to right and right to left or using cluster patterns.
Slots also offer a varying number of paylines, depending on the title. Some online slot paylines offer a few dozen ways to win, while others have thousands of paylines with new and exciting patterns. For example, Megaways games can expand the reels for 117,649 win lines, with every spin potentially fitting up to 49 symbols on six reels. Check the slot paytable for info on the available paylines.
Multipliers
Like most online casino games, a prize multiplier decides the final payout value in specific slots. Online slot multipliers can be low, high, or anything in between. They also come in different formats, such as rising multipliers and stacking multipliers, and all increase the win by multiplying the stake per spin.
Gamble Feature
Online slots with a gamble feature up the ante by allowing players to place an additional bet after a win, usually with an even split for winning or losing. The win is doubled if players guess the outcome correctly, but players lose everything if they make the wrong choice. Some slots let players gamble with a percentage of the total win instead of risking the full amount.
Slot Symbols
Pay symbols aren’t the only symbols found in slot games. Many game developers include a mix of wilds, scatters, and symbols to boost the odds of winning. These symbols often unlock the best odds in the game, with generous multipliers that might even lead to a jackpot prize.
Wilds
The slot wild symbol, which can be found in most games nowadays, serves the same function as the joker does in popular card games: it substitutes for other symbols in winning combos. Wilds can also transform in different ways, expanding to cover entire reels, turning other symbols into wilds, or becoming sticky symbols on cascading reels.
Scatters
Slot scatter symbols activate extra features. Unlike regular symbols, scatters can drop anywhere on the reels, unlocking mechanics that give players additional spins. Most games require three or more scatters to trigger slot bonus features, but some games might randomly unlock features for as little as one scatter.
Special Symbols
Special symbols are unique to each game. In some instances, games add extra symbols with instant cash prizes, while others have mystery symbols that transform into other symbols at the end of a spin. Some of these symbols are tied to game-specific features, such as the Link & Win feature found in Microgaming slots.
Extra Rounds
Online slots with extra rounds offer a diverse and delightful assortment of special slot game mechanics and top prizes. These rounds enhance the experience, increase your chances of winning, and can reward players with anything from extra spins and respins to jackpots.
Extra Spins
Extra spins in slots give players additional chances to win without needing to wager again. Slot games offer two types: extra spins and respins.
Extra spins are mostly triggered by scatters, which can either trigger an extra round of regular spins or provide a choice between different spin modes, with special modifiers such as a higher drop rate for the most elusive symbols.
Respins are similar to cascading reels. The symbols that trigger these spins become sticky, and players receive a certain number of spins to create more matches. Additional symbols can reset the respins counter. Typically, extra spins and respins offer the biggest wins in the game.
Jackpots
Online slot jackpots are the ultimate prizes, but they’re often locked behind mini-games or additional rounds like extra spins. Players get pick-and-click options, wheel-based mini-games, and other interesting, innovative feature rounds. Jackpots are typically scaled to the initial wager, but also come in static amounts — just be careful to manage your bankroll using slot strategies and tips, and avoid chasing jackpots over regular payouts.
