Finn and the Swirly Spin slot

What makes the Finn and the Swirly Spin slot different

Most online slots spin reels and pay along lines or ways. Finn and the Swirly Spin does neither. Symbols are arranged in a spiral on a 5x5 grid, and the game pays whenever three or more matching symbols line up horizontally in a row or vertically in a column. It was made by NetEnt, the Stockholm studio founded in 1996 and owned by Evolution since December 2020.

The grid holds 25 symbols in five rows and five columns, so there are ten straight lines along which a match can form. Because matches are checked in two directions, the board behaves more like a puzzle than a classic five-reel slot.

How the features work: the spiral, the key and the four worlds

Filling the spiral

Each round, the grid fills with symbols arranged along the spiral. Any group of three or more identical symbols in a row or column pays. The spiral shape matters because it is also the route for the game's key.

The key's journey

The key starts on the outside of the spiral. Winning combinations clear a path for it, and it moves along that path towards the centre. How far it travels on a given round depends on the wins that land, which are random, so its progress can be quick or slow.

The four bonus worlds

When the key reaches the middle of the grid, it opens a free spins round set in one of four worlds: Lucky Mug, Lava Lair, Starbar or Golden Pot. The names point to the game's Irish-folklore styling. Our checked data names the worlds but doesn't describe their rules, so read the game's help screen for what happens in each.

Finn has no scatter-triggered bonus. The free spins depend on the key completing its route to the centre, and that progress comes entirely from random wins.

How to play Finn and the Swirly Spin online

1. Open the information screen to check the RTP version and read the paytable.
2. Choose your stake. There are no lines to set, because every row and column is always checked.
3. Start the round and watch the spiral grid fill with symbols.
4. Any three or more matching symbols in a row or column pay and clear space.
5. See whether the cleared space lets the key move closer to the centre.
6. When the key reaches the middle, a free spins round begins in one of the four worlds.
7. After each round, glance at the net spend and time display required under UK rules.

Finn and the Swirly Spin RTP: what 96.62% costs

The 96.62% figure is the game's highest RTP version, which means a house edge of 3.38%. Casinos can install lower versions, and the figure they use should appear in the help screen. Over enough rounds, 96.62% returns an average of £96.62 for each £100 staked. A short session can land far from that in either direction, which is what the law of large numbers is about.

If a casino runs a lower version, the cost rises in line with it. Every percentage point of RTP is worth £1 per £100 staked, so it is worth the few seconds it takes to check.

Low-to-medium volatility and a £20 budget

A low-to-medium volatility rating means Finn's return is spread over many smaller and middling results rather than packed into rare jackpots. With wins counted in rows and columns, small payouts come along regularly, and each win can help clear the key's path. That makes the game a reasonable fit for a modest budget at a low stake.

Regular small wins can make a session feel cheaper than it is. Remember that UK slots must not celebrate a return lower than the stake, so a modest win that does not cover your bet should pass without fanfare. Track the net spend figure, not the number of wins. Our guide to low-volatility slots has more games with this profile.

UK rules for Finn and the Swirly Spin

Although it has no reels in the usual sense, Finn is sold as an online slot, so slot rules apply. Since 31 October 2021, UK slots have had no autoplay, no turbo or slam-stop and a minimum of 2.5 seconds per spin. Stakes are capped at £5 for players aged 25 and over and £2 for players aged 18 to 24; the Commission's online slots stake limit guidance (opens in a new tab) sets out how a game cycle is measured. Since 17 January 2025 you must be shown net spend and time played, and you can't run several games at once. More detail: game design rules and stake limits.

Finn and the Swirly Spin myths

• "The key is close, so the bonus is due." The key's position shows progress, but each new grid is random. A key near the centre still needs the right wins to clear the last steps.
• "Small stakes make the key move faster." The stake changes the size of wins, not how symbols are placed.
• "Lots of small wins mean the game is paying well." Frequent small wins are what low-to-medium volatility looks like. The long-run return is still set by the RTP.

For the general maths, see independent events and our list of common slot myths. The Wizard of Odds slots section (opens in a new tab) also explains why slot outcomes cannot be predicted.

Finn and the Swirly Spin review: verdict and similar games

For other games where position on a grid matters more than lines, try our cluster pays guide, or browse Irish-themed slots.

Where to play Finn and the Swirly Spin in the UK

Our partners do not publish whether they carry Finn and the Swirly Spin, so look in the casino's game lobby first. These partner offers are slot spin offers on named or selected games and may not cover this one. All are 18+ and terms apply.

• PlayOJO: new UK customers (excluding Northern Ireland) who deposit £10 or more for the first time get 80 free spins on Big Bass Bonanza, 10p each, with no wagering on winnings, which are paid in cash.
• Coral: deposit and bet £10 on slots to receive 100 free spins on selected games at 10p, which you must accept within 48 hours and use within 7 days; no wagering on winnings, and some payment types are excluded.
• Ladbrokes: spend £10 on slots to get 50 free spins each day for 10 days, up to 500, 10p each on selected games, claimed before 23:59 daily and valid for 7 days, with no wagering; some deposit methods don't count.

If you're worried about your gambling, the NHS gambling support page (opens in a new tab) explains the free treatment available.

18+. Every casino game has a built-in house edge, so over time you should expect to lose what you stake. Set a budget before you play and stop when it’s gone: safer gambling tools and support. Free, confidential help: National Gambling Helpline 0808 8020 133.