20000 Leagues Under The Sea

20000 Leagues Under the Sea Overview

20000 Leagues Under the Sea is a five-reel slot from KA Gaming with 25 paylines, released on 16 October 2024. It borrows its title and its cast from Jules Verne: a bearded sea captain, two scientists, sharks, icebergs and a submarine that doubles as the wild.

The stake runs from 0.25 to 125. KA Gaming offers it at RTP settings from 82% to 98%, chosen by the casino; our data box shows 96%. No volatility rating or maximum win is published.

All figures below were read from demo play at the maximum $125 bet, which is $5 per line.

Riveted Brass and Deep Water

The reels sit inside a riveted copper-and-brass frame, like the viewing window of a nineteenth-century submarine. Three small green lights glow at the top of the frame, and a line counter reading 25 LINES is stamped into the panels on either side.

Behind the frame is the sea floor: dark water, rocks and the faint outlines of fish. The symbols are a mix of portraits and card suits. The captain in his peaked cap and long coat is the premium symbol, followed by two scientists in suits, a great white shark and an iceberg. The lower symbols are ornate brass card suits – clubs, hearts, diamonds and spades set with coloured gems.

When the free games start, the background changes to the inside of the vessel, with brass fittings and round portholes, and the words FREE GAME run down both sides of the reels.

The Paytable

At the $125 bet the paytable reads as follows. The captain pays $5,000 for five, $1,500 for four, $400 for three and $100 for two – the only symbol that pays for a pair.

The two scientists share a row: $2,500, $750 and $200 for five, four and three. The shark pays $1,250, $400 and $100, and the iceberg $750, $300 and $75.

In multiples of the total bet, five captains on one line are worth 40x, five scientists 20x and five sharks 10x. Those are line wins, and several lines can pay on the same spin.

At the other end of the table, three icebergs return $75, which is 0.6x the stake, and a pair of captains $100, or 0.8x. Most single-line wins in the base game therefore return less than the bet, and it takes several lines paying together to finish a spin ahead.

The 25 Lines

The lines screen shows all 25 patterns on the five-by-three grid: the three straight rows first, then V shapes, zigzags and stepped lines that cross between the top and bottom rows. The lines are fixed, so every spin plays all 25.

The footer names every paying line as it lands. One base-game spin in our captures reported LINE 14 WINS $100.00 as part of a larger $300.00 total, with the win lines traced across the reels in purple.

Scatters and Free Games

The scatter is a rolled-up sea chart with a compass on it, labelled SCATTER. Three of them anywhere on the reels paid $375 in our capture – 3x the total bet – and awarded 15 free games.

The captain then appears with a rifle over his shoulder to announce the prize: YOU WON 15 FREE GAMES. A single touch starts the round.

The slot databases also list additional free spins, which suggests the round can be extended by further scatters. We did not see a retrigger during our session.

The Free Games Multiplier

The free games carry a multiplier badge in the top-right corner of the reels. It read 1X at the start of our round and 3X later on, so it climbs as the round goes on.

The effect is easy to see in the footer. With the badge at 3X, one spin reported LINE 20 WINS $1200.00 (3X), and the screen celebrated a NICE WIN of $1,600.00 across several lines.

By the time seven free games were left, the TOTAL BONUS WIN counter stood at $2,440.53 – about 19.5x the stake, with seven of the fifteen games still to play.

During the round the spin button turns into a countdown of the free games remaining – it showed 13 early in our round and 7 at the later capture – so you always know how much of the feature is left while the multiplier badge climbs.

The footer keeps two separate totals in play: WIN for the current spin and TOTAL BONUS WIN for the round as a whole, which had already reached $150 after the first couple of free games.

The Submarine Wild

The wild is a brass submarine with a periscope, marked WILD. It substitutes for the regular symbols on a line, and in our free-games captures it appeared on the middle reels, where it can complete lines in both directions from the centre.

One early free spin showed two wilds together producing a $100.00 line win at the 1X stage, which the multiplier would have tripled later in the round.

Who Should Play It

20000 Leagues Under the Sea is a straightforward 25-line slot with one clear goal: reach the free games and let the multiplier climb. The paytable is modest in the base game, where even five captains are 40x, and the scatter pays just 3x.

The free games are where the value sits, and our round had already passed 19x with seven games left. The reservation is the missing volatility figure and the variable RTP: depending on the casino it can run anywhere from 82% to 98%, so check the info screen before you play.

Where to Play 20000 Leagues Under the Sea

You can try this game on LuckyBar Online Casino. There’s a unique casino bonus offer of 300% up to £1500 for a limited time.

20000 Leagues Under the Sea was listed in all six of our partner casino libraries when we checked on 23 September 2026.