Feature meaning in slots

Feature meaning in slots, in plain terms

In slot language, a feature is anything the game does beyond paying for matching symbols. Wild symbols are a feature. So are tumbling reels, random multipliers, collect symbols and free spins. The word has a broad sense, covering all of these, and a narrow one: players often say “I got the feature” meaning a bonus round has started. The help screen usually lists features one by one, and our features hub does the same across hundreds of games.

The narrow sense overlaps with bonus game, while the broad sense includes plenty of things that happen in the base game. Both are covered in the slot machine glossary.

The three groups of slot machine features

Symbol features such as wild symbols and expanding wilds appear on almost every modern game. Reel features like cascading reels define titles such as Bonanza Megaways and Gates of Olympus. Bonus features are the rounds covered on our page about slot bonus features.

A feature in action: a cascade example

Cascades, also called tumbles or avalanches, show how one feature can stretch a single stake. Here is a made-up sequence on a 20p spin.

1. The spin lands a win of 10p. Winning symbols disappear.
2. New symbols fall into the gaps and form another win of 15p.
3. Those symbols clear and a third drop pays 25p.
4. No further win forms, so the sequence ends.
5. Total return: 10p + 15p + 25p = 50p from one 20p stake, a net gain of 30p.

Add a multiplier that rises with each cascade and the last step could pay 75p instead. That compounding is why cascade games can produce rare large results and long runs of small ones, and why they tend to be rated higher volatility.

How features change a slot's cost and volatility

Features do not create money. The game's RTP is fixed by its maths model, and every feature's average value is already inside that number. What features do is move the return around: from many small base-game wins towards fewer, larger feature wins. The more value sits in a rare feature, the more the game swings.

Compare Starburst, whose expanding wild respins happen in the base game and which is rated low volatility, with Book of Dead, whose free spins with an expanding symbol hold much of the return, rated high. Both return around 96%, but a session on each feels very different. If you want to know why slots have so many features now, part of the answer is that features give designers more ways to shape that experience.

Features on fruit machines: holds, nudges and the trail

On British fruit machines, “the feature” traditionally means the board or trail around the reels where you climb towards cash prizes. The machine also offers holds and nudges, and sometimes a skill stop, which let you act on what the machine has offered. Using them well can avoid missing a win the machine is presenting, but it does not beat the built-in payout percentage, and many such machines are compensated. Our fruit machine features guide explains each one.

Pub machines are normally Category C, with a £1 maximum stake and £100 top prize, according to the Gambling Commission's gaming machine categories (opens in a new tab). Players must be 18 or over.

The gamble feature: a special case

Some games let you risk a win on a higher-or-lower or red-or-black choice. The hi-lo gamble feature does not improve your long-run return; at best it is roughly neutral on average and it adds risk. On fruit machines a gamble ladder works similarly. Treat it as optional and skip it if you are trying to keep a session steady.

UK rules on slot features

UK-licensed online slots cannot offer autoplay, turbo or slam-stop, must not celebrate returns equal to or less than the stake, and must take at least 2.5 seconds per spin, all since 31 October 2021. They also do not offer feature buys; see bonus buy in the UK. Game rules, including how each feature works, must be available to players under the remote gambling and software technical standards (opens in a new tab).

Slot features and the partner offers

Offer spins at the two partner casinos play every feature a game has, at a fixed stake of 10p. Coral gives new players aged 18+ who deposit and bet £10 or more on slots 100 free spins on selected games; accept within 48 hours, use within 7 days, no wagering on winnings. Ladbrokes gives new customers aged 18+ who deposit and play £10 on slots 50 free spins a day for 10 days (up to 500), 10p each, claimed before 23:59 daily, no wagering. Certain payment methods do not qualify and terms apply. The same company runs both, so read the terms on holding accounts with each, and search each lobby rather than assuming a particular game is listed.

18+. Gambling should be entertainment that costs money, not a way to make it. Decide a budget before you play: plan a slot budget. Free, confidential help: National Gambling Helpline 0808 8020 133.