Slots Like Lost City of the Djinn: Free Spins That Guarantee a Massive Mystery Symbol Every Time

Lost City of the Djinn is a five-reel, three-row Arabian Nights slot from Thunderkick, running on 25 fixed paylines with a headline RTP of 96.07% (Thunderkick also publishes 94.12%, 92.03% and 89.94% builds, so the live figure at any given casino depends on which configuration it runs). Stakes span 10p to £100, and the game carries a very high volatility rating built around a 25,000x stake ceiling, a Massive Mystery Symbol that can land during ordinary base game play, a scatter-triggered free spins round and a hold-and-win style Djinn Spins bonus with its own Upgrade and Copy mechanics. If the combination of a locked-symbol cash feature and a guaranteed mystery upgrade on every free spin appeals to you, this page also rounds up a few slots like Lost City of the Djinn worth trying once you have had a proper go on this one.

Where to Play

18+ only. T&Cs apply. Please gamble responsibly.

How the Game Works

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The story here is a fairly standard 1,001 Nights setup, a buried desert city and a magic lamp that still has a Djinn sealed inside it, but Thunderkick renders it with the same bright, cartoon-leaning art style the studio has leaned on across its recent catalogue. Golds, purples and warm sandstone tones dominate the reels, and the whole presentation feels closer to an animated adventure than anything dark or horror-tinged, which is a deliberate departure from the more atmospheric desert slots other studios have built around the same setting.

Base spins are kept fairly calm by design, because most of the weight in this game sits inside its two bonus mechanics rather than the ordinary paytable. The Massive Mystery Symbol is worth watching for even outside the free spins, since it is a 3×3 block that can land across the middle three reels at any point and flip into a single matching symbol, occasionally turning an otherwise average-looking spin into several matching lines at once. Once the hourglass scatters line up and the free spins round begins, the pace shifts, and once the golden lamp scatters trigger Djinn Spins, the whole feel of the round changes again into something closer to a coin-collecting hold-and-win game.

This is a slot built for players who want real structure behind their bonus rounds rather than one repeated trick stretched across an entire session. The very high volatility, combined with a split between a mystery-symbol free spins round and a locked-symbol cash bonus, means quiet stretches between meaningful wins are the norm rather than the exception, so it suits a patient player working with a bankroll that can absorb a good number of uneventful spins while waiting for one of the two features to properly land.

Symbols and Paytable

The paytable splits cleanly into two tiers. Playing card suits fill the lower end, with hearts and diamonds paying a little more than clubs and spades, while four character icons, an explorer, a scholar, a pilot and the blue Djinn himself, make up the higher-paying symbols. Published paytable figures put the top character symbol and the Wild at around 30x stake for five of a kind, and the Wild substitutes for every symbol on the reels except the free spins scatter and the cash scatter used to trigger Djinn Spins. Those base-game numbers sit well inside what you would expect from a mid-tier Thunderkick release, and the real ceiling on this game comes from its two bonus rounds rather than any single base-game combination.

Free Spins

Landing three, four or five of the hourglass scatter symbols sends you into the free spins round, awarding 10, 15 or 20 free spins depending on how many scatters land. The round cannot be retriggered once it starts, but Thunderkick has built in a way to soften that limit: a Massive Mystery Symbol is guaranteed to appear on every single free spin, rather than the random chance you get for one showing up during ordinary base game play.

Massive Mystery Symbol

The Massive Mystery Symbol is a 3×3 block that can land across reels two, three and four during normal base game spins. When it appears, the entire block transforms into a single matching regular paying symbol, never into a scatter, which can turn what looked like a fairly ordinary spin into several matching combinations landing together. Because it forces every position within that block into the same symbol, it tends to deliver more useful wins than a standard spin covering the same three reels would.

Djinn Spins

Three or more of the golden lamp cash scatter symbols trigger Djinn Spins, Thunderkick’s version of the hold-and-win format. Every cash symbol that lands locks into place on the grid, and the round begins with a bank of three respins that resets back to three each time a new sticky symbol appears. Two special symbols can show up while the respins are running: an Upgrade symbol that increases the cash value of symbols already locked on the grid, and a Copy symbol that duplicates an existing cash value onto other positions. A Pattern Collect mechanic also doubles the value of collected symbols once five highlighted positions on the grid have been filled, giving the round a genuine escalation path rather than a flat coin count that simply adds up as it goes.

Pros and Cons

Pros

• A 25,000x stake ceiling backed by a Djinn Spins round with real escalation built in through the Upgrade, Copy and Pattern Collect mechanics
• Guaranteeing a Massive Mystery Symbol on every free spin removes some of the randomness that similar mystery-symbol slots leave entirely to chance
• A bright, cartoon-style Arabian Nights presentation that stays cheerful rather than leaning into a darker, more atmospheric desert look
• Two genuinely distinct bonus paths, a mystery-symbol free spins round and a locked-symbol cash game, give it more variety than a single-feature slot
• The 96.07% headline RTP sits close to the UK online average when an operator runs the top-tier build

Cons

• Operators can run reduced 94.12%, 92.03% or 89.94% configurations, so the RTP you actually get depends on the casino you play at
• Free spins cannot be retriggered, so a single round of 10 to 20 spins is all you get once one starts
• Very high volatility means long gaps between meaningful wins are a normal part of a session, not an exception
• The overall 25,000x ceiling includes a 750x cap on any single base-game spin, so the largest numbers only arrive through the feature’s carry-over mechanics rather than one outright spin
• There is no sequel or wider series built around the title, so there is nowhere obvious to go for more of the same specific format afterwards

Game Screenshot

Djinn Spins in Action

Demo Play

Thunderkick’s own site and most UK-facing casinos that carry its catalogue let you run Lost City of the Djinn in a free demo, using the same paytable and feature rules as the real-money version, just without knowing which specific RTP tier a given operator has configured for cash play. It is worth working through the Djinn Spins round in demo mode first, since the Upgrade, Copy and Pattern Collect mechanics take a spin or two to properly click into place.

Expert Take

Lost City of the Djinn arrived a couple of years after Thunderkick’s most talked-about cascade-based releases, and it reads as the studio applying its usual visual polish to a more familiar hold-and-win format rather than inventing something new from scratch. The Massive Mystery Symbol is the part that tends to stand out most, mainly because forcing it onto every free spin is a small but genuine design choice that removes some of the frustration players usually associate with mystery-symbol mechanics that are left entirely to chance. The Djinn Spins round itself sits comfortably alongside other locked-coin bonus rounds already on the market, and the Pattern Collect doubling mechanic gives it a touch more depth than a plain hold-and-win clone, even if it has not become the single most discussed release in Thunderkick’s back catalogue.

Similar Slots to Try

If the Arabian Nights setting and the genie-lamp premise are what drew you to Lost City of the Djinn, these games explore the same theme in different ways.

About the Developer

Lost City of the Djinn was developed by Thunderkick, an independent studio founded in Stockholm in 2012 by a team of former NetEnt developers. The studio remains independent rather than sitting under a larger group the way several older providers now do, and it holds licences from the UK Gambling Commission through both Thunderkick AB and Thunderkick Malta Ltd, alongside the Malta Gaming Authority, Sweden’s Spelinspektionen and Ontario’s AGCO. Thunderkick has always favoured a smaller, more tightly curated catalogue over sheer volume, and while the studio is best known for its Esqueleto Explosivo series and earlier cascade-based hits, Lost City of the Djinn shows it applying that same production polish to a hold-and-win format rather than a cascading one.

Other Thunderkick games worth trying after Lost City of the Djinn include Pink Elephants 2, 3 Wildos, Eager Beavers and Rocket Fellas Inc, all from the same studio.

• Pink Elephants 2
  
  A trippy, colourful cascading slot from earlier in Thunderkick’s catalogue, showing a very different visual direction to the desert setting used here.
• 3 Wildos
  
  A wild-collecting slot with its own upgrade mechanic, giving it a loose thematic overlap with the Upgrade symbols used in Djinn Spins.
• Eager Beavers
  
  A more recent Thunderkick release built around an expanding cascade grid, a good example of the studio’s more experimental side.
• Rocket Fellas Inc
  
  A retro space-heist slot with its own sticky wild respin feature, offering another angle on Thunderkick’s fondness for locked-symbol bonus rounds.

Lost City of the Djinn Key Stats

Lost City of the Djinn slot information last reviewed: July 2026

Lost City of the Djinn Slot Info
Name:	Lost City of the Djinn
Provider:	Thunderkick
Developer Rank:	9th out of 45+ Thunderkick games
RTP:	96.07% (operators can also run 94.12%, 92.03% or 89.94% configurations, check before playing)
RTP Category:	Medium-High
RTP Rank:	Around UK average
Feature Description:	Free Spins (10 to 20 spins), Massive Mystery Symbol, Djinn Spins Hold and Win, Upgrade and Copy Modifiers, Pattern Collect.
Feature Categories:	Free Spins, Mystery Symbol, Hold and Win
Reels:	5
Rows:	3
Paylines:	25 fixed
Volatility:	Very High
Volatility Rank:	Very High
Min Bet:	£0.10
Max Bet:	£100
Max Win:	25,000x stake (single base-game spins are capped at 750x before feature carry-over)
Release Date:	9 May 2022 (exclusive launch), wide release 23 May 2022
Slotslike Rank:	1,890 out of 4,300+ games (View Top 100)

Slots with the Same Features

This game falls into the following bonus categories: Free Spins, Mystery Symbol and Hold and Win.

Slots with a Hold and Win Bonus

Other slots built around a locked-symbol, coin-collecting hold and win round include Chilli Heat and Wolf Gold.

Slots with a Free Spins Round

Other slots with their own scatter-triggered free spins bonus include Jaws of Justice and Greedy Alice.

Frequently Asked Questions

How does Djinn Spins work in Lost City of the Djinn?

Landing three or more golden lamp cash scatters triggers Djinn Spins. Every cash symbol that lands locks in place, and the round starts with three respins that reset back to three each time a new sticky symbol appears. Upgrade symbols raise the value of locked symbols, Copy symbols duplicate an existing value elsewhere on the grid, and a Pattern Collect mechanic doubles collected values once five highlighted positions are filled.

What is the RTP of Lost City of the Djinn?

The headline build pays back 96.07%, which sits close to the UK online average. Thunderkick also publishes 94.12%, 92.03% and 89.94% configurations, and operators choose which one to run, so it is worth checking the in-game info tab before you play.

What is the maximum win on Lost City of the Djinn?

25,000x your total stake. Single base-game spins are capped at 750x, so the largest totals build up through Djinn Spins and the Massive Mystery Symbol working together across a round rather than landing in one single spin.

Is Lost City of the Djinn high volatility?

Yes, most sources rate it very high volatility, with slotcatalog describing it simply as high. Either way, expect long spells between meaningful wins punctuated by occasional large swings from the two bonus features.

What are the best slots like Lost City of the Djinn?

Chilli Heat and Wolf Gold share the locked-symbol hold and win format used in Djinn Spins, while Arabian Nights, Crazy Genie, Cash Camel and Magic Lamp all sit in the same genie-lamp, Arabian Nights setting.

Can I play Lost City of the Djinn for free?

Yes. Thunderkick’s own site and most UK-facing casinos that carry its catalogue offer a free demo mode, which is a sensible way to see how the Massive Mystery Symbol and Djinn Spins actually play out before staking real money.

Who makes Lost City of the Djinn?

Thunderkick, an independent Stockholm studio founded in 2012 and licensed by the UK Gambling Commission, the Malta Gaming Authority and Sweden’s Spelinspektionen. Lost City of the Djinn launched exclusively on 9 May 2022 before a wider release on 23 May 2022.

Our Verdict on Lost City of the Djinn

Lost City of the Djinn is a solidly built Thunderkick release that takes a familiar Arabian Nights setting and pairs it with two bonus mechanics that genuinely complement each other. The guaranteed Massive Mystery Symbol on every free spin is the standout design choice, and the Djinn Spins round has enough going on with its Upgrade, Copy and Pattern Collect symbols to avoid feeling like a plain hold-and-win clone. The variable RTP tiers and the very high volatility mean it will not suit everyone, and the 750x single-spin cap within the wider 25,000x ceiling is worth knowing about before you sit down with it, but as a genie-lamp slot with real bonus depth it holds up well. If the setting is what appeals to you most, Crazy Genie and Magic Lamp are worth comparing it against before you settle on where to spend a session.

SlotsLike rating: 7/10