Slots Like Mystery Mission – To The Moon: The Mystery Stack Explained

Mystery Mission – To The Moon sends Push Gaming’s Mystery Stack mechanic into space, running a fixed 6 reel, 4 row grid across 20 paylines rather than any cascading or Megaways format. Portal-style Mystery Stack symbols nudge to fill their entire reel and reveal a matching random symbol whenever 3 or more land at once, paying out instantly across all 20 lines. The Wild Moon works as both wild and scatter, and landing 3, 4, 5 or 6 anywhere awards 8, 10, 12 or 14 free spins, during which locked Mystery Stacks stay in place for the rest of the round and each new one adds an extra spin. An optional Ante Bet, the studio’s first, raises the stake by 25% in exchange for a higher chance of Wild Moon symbols appearing. The default build pays back 96.25% at a consistently high volatility, with a 10,000x stake maximum; the buy-in shortcut is offered only on non-UK operators.

Where to Play

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

Slots Like Mystery Mission – To The Moon

Most of the picks here come from within Push Gaming’s own back catalogue, since the studio’s Mystery Stack mechanic doesn’t show up in many other developers’ games.

• Goat Getter
  
  Mountain goats and a Coin Drop Feature take the place of the astronauts and Mystery Stack reveal mechanic that define this release.
• Cats Of Olympuss
  
  Greek mythology and a growing reel matrix replace the sci-fi crew and Mystery Stack system entirely, though the studio’s house style still shows through.
• Fish N Nudge
  
  Fishing rods and a reef setting take over from the space station here, and a slow-building Net symbol does the job the instant Mystery Stack reveal handles in this release.
• Boss Bear
  
  A crime syndicate setting from Push Gaming, built around a Golden Reveal Coin Feature instead of the fixed-payline Mystery Stack system used in this release.
• Bamboo Ways
  
  A jungle temple setting stands in for the sci-fi crew, with a growing ways-to-win count doing a very different job to the fixed paylines and Mystery Stack system found in this release.
• Big Bamboo
  
  A calmer panda-led forest release from Push Gaming, trading the sci-fi Mystery Stack reveal system here for a Golden Bamboo respin mechanic.
• Razor Shark
  
  The title that originally introduced the studio’s Mystery Stack respin mechanic, running it on an undersea theme rather than the fixed-payline space setting used here.
• Jammin Jars
  
  A much lighter earlier release from the studio, running exploding fruit jars and a tumble mechanic instead of the fixed paylines and Mystery Stack reveals found in this game.
• Santa Hopper
  
  A Christmas reskin of the studio’s Dragon Hopper engine, running the same 7×7 cluster grid rather than the Mystery Stack mechanic used here.
• Wild Swarm 2
  
  A bee-themed sequel from the same studio, running fixed paylines and a Hive Meter rather than the lunar setting and Mystery Stack mechanic used here.

How the Game Works

Reviewed by Paul Stone
Published: July 2026

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Rocky planetary symbols fill the lower-tier payouts, medals and ray guns carry the mid-tier wins, and robots, astronauts and a Mystery Martian sit at the top of the paytable. Twenty fixed paylines run across a 6×4 grid, matching symbols left to right just like any classic slot. Portal-style Mystery Stack symbols can land anywhere, and whenever 3 or more appear on a single spin, they nudge to fill their entire reel and flip to reveal a matching random symbol underneath, paying out instantly across all 20 lines.

The Wild Moon symbol works as both wild and scatter: as a wild it substitutes for every regular paying symbol except Mystery Stacks, and landing 3, 4, 5 or 6 anywhere on the grid triggers Free Spins. An optional Ante Bet, the first the studio has ever built into one of its releases, raises the stake by 25% in exchange for a higher chance of Wild Moon symbols appearing during play.

Free Spins and the Mystery Stack Lock

Landing 3, 4, 5 or 6 Wild Moon symbols awards 8, 10, 12 or 14 free spins respectively. The key difference from the base game is that any Mystery Stack landing during the bonus locks in place on the reel rather than clearing away, staying there for the rest of the round, and each further Mystery Stack that lands adds an extra spin on top of the current total. The locked stacks cycle through symbols before settling on their final reveal, building real tension as the round progresses toward a premium payout.

Operators outside the UK can offer five Bonus Buy tiers, running from 102x stake for a guaranteed 3 Wild Moons up to 332x stake for a guaranteed 6, plus a 200x random option. UKGC rules require UK-licensed sites to strip that entire menu out, so UK players rely on the natural scatter trigger.

Pros and Cons

Pros

• The Mystery Stack reveal mechanic gives ordinary base game spins real instant-win tension
• Locked stacks during Free Spins build a genuine sense of anticipation toward a premium reveal
• 96.25% RTP sits above the UK market average
• Topping out at 10,000x stake, the ceiling holds its own against most of the studio’s other releases
• The retro sci-fi presentation is polished and distinct from the rest of the studio’s output

Cons

• The option to buy straight into the bonus simply isn’t there for UK-licensed play, unlike some operators abroad
• The 10,000x ceiling is noticeably lower than predecessor Mystery Museum’s max win
• High volatility means the natural Wild Moon trigger can go quiet for long stretches
• Reduced RTP configurations down to 88.28% are also reported in circulation at some operators

Game Screenshot

Spend a solid run on the free demo to see how the Mystery Stack reveals actually land, since the high volatility here means a short session can easily give the wrong impression.

Expert Take

Reviewers are broadly positive on Mystery Mission – To The Moon, praising the polished sci-fi presentation and the genuine tension the locked Mystery Stacks add during Free Spins. The most consistent criticism is that the 10,000x ceiling represents a real step down from predecessor Mystery Museum’s max win, and a handful of reviewers reckon the payback percentage could stand to be a little more generous given how volatile the game plays.

About the Developer

Mystery Mission – To The Moon launched from Push Gaming on 9 November 2022 as part of the studio’s in-house Mystery Series, building directly on the Mystery Stack mechanic first introduced in Razor Shark and later refined in Mystery Museum. The Ante Bet feature marked the studio’s first use of that mechanic across its whole catalogue. See more on our Push Gaming slots page.

Mystery Mission – To The Moon Key Stats

Mystery Mission – To The Moon slot information last reviewed: July 2026

Slots with the Same Features

A couple more worth a glance once the main list above has been picked over.

More Mystery Stack Slots

Both run the same core mechanic, just wrapped in a different setting and mid-round twist.

More Push Gaming Slots

Both stick to a very different bonus structure, useful for seeing the wider range of the studio’s output.

Frequently Asked Questions

How does the Mystery Stack mechanic work?

Portal-style Mystery Stack symbols nudge to fill their entire reel and reveal a matching random symbol whenever 3 or more land on a single spin, paying out instantly across all 20 lines.

What does the Wild Moon symbol do?

It works as both wild and scatter, substituting for every regular symbol except Mystery Stacks and triggering Free Spins when 3 or more land anywhere.

How many free spins can you win?

Landing 3, 4, 5 or 6 Wild Moon symbols awards 8, 10, 12 or 14 free spins respectively.

What happens to Mystery Stacks during Free Spins?

They lock in place rather than clearing away, staying for the rest of the round, and each new one that lands adds an extra spin.

What is the Ante Bet?

An optional feature that raises the stake by 25% in exchange for a higher chance of Wild Moon symbols appearing, the first Ante Bet Push Gaming has built into any of its games.

Is there a Bonus Buy option for UK players?

No, the purchase menu is only available at operators outside the UK, so UK players rely entirely on the natural Wild Moon trigger.

What is the maximum win on Mystery Mission – To The Moon?

10,000x stake is the top prize on offer.

Is this a sequel to another Push Gaming slot?

Yes, it builds on the Mystery Stack mechanic first introduced in Razor Shark and later refined in Mystery Museum.

Who makes Mystery Mission – To The Moon?

Push Gaming released the game on 9 November 2022.

Our Verdict on Mystery Mission – To The Moon

Mystery Mission – To The Moon takes a proven Push Gaming mechanic into a fresh sci-fi setting, and locking Mystery Stacks in place during Free Spins gives the bonus round genuine building tension that the base game alone can’t match. The 10,000x ceiling falling short of predecessor Mystery Museum’s max win is a fair criticism, and UK players lose out on the Bonus Buy menu entirely, but a strong 96.25% RTP and a genuinely distinctive reveal mechanic keep it well worth a look for patient, high-volatility players.

SlotsLike rating: 7.5/10