Who Wants to Be a Millionaire Slots by Big Time Gaming: The Games, Rated and Compared
Who Wants to Be a Millionaire slots are Big Time Gaming’s games built on the TV quiz show, from the original Millionaire on Megaways reels to its Hot Seat gamble, where you climb a ladder of free spins.
Megapays and Megapots add progressive jackpots, Megapots with Hold and Spin and a bonus buy, while Mystery Box and Millionaire Rush switch to a classic layout and to Megaclusters.
- 5 games reviewed
- Nov 2018 first release
- Mar 2026 latest release
Top 5 Who Wants to Be a Millionaire Slots
Select a slot to see its details.
Top 5 Who Wants to Be a Millionaire Slots in Detail
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1. Millionaire Megapots
Studio Big Time Gaming Released March 2026 Layout 6 reels, Up to 200,704 Bonus Buy Available Mechanics Megaways, Hold and Win, Cascading Reels, Gamble Feature
This edition brings Hold and Spin to the series: Coins lock in for respins and can reveal the Mini, Midi or Mega Megapots, next to the Hot Seat Free Spins Gamble of the original Millionaire. It also has bonus buys and Power Play, which guarantees more ways on each spin. It is rated high volatility.
Pros
Bonus buys and Power Play, unlike Millionaire Megapays
A Hold and Spin feature with jackpots, which the original Millionaire does not have
Cons
Its jackpots only drop in Hold and Spin, whereas Millionaire Megapays can trigger its feature from any bet
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2. Millionaire Megapays
Studio Big Time Gaming Released August 2021 Layout 6 reels, 117,649 Mechanics Progressive Jackpot, Megapays, Megaways, Cascading Reels
This edition keeps the Megaways reels, reactions and Hot Seat Free Spins Gamble of the original Millionaire, and adds the Megapays Feature: respins with symbol locking and four progressive jackpots, Mini, Midi, Major and Mega. Part of every bet feeds those jackpots. It is rated high volatility.
Pros
Four progressive jackpots, one more than the Megapots of Millionaire Megapots
The same Hot Seat Free Spins Gamble as the original Millionaire, with a jackpot layer on top
Cons
No bonus buy, unlike Millionaire Megapots
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3. Millionaire Rush
Studio Big Time Gaming Released June 2022 Layout 5 reels, Cluster Pays Mechanics Megaclusters, Cluster Pays, Split Symbols, Cascading Reels
Millionaire Rush changes the format of the series: a Megaclusters grid where winning symbols split into smaller ones, and a MegaTrail ladder that changes on every base spin and unlocks Random Bonuses, Free Spins and a Bonus Prize as reactions climb it. It has no gamble. It is rated high volatility.
Pros
A MegaTrail of bonuses on every base spin, unlike the original Millionaire
Random Bonuses that change symbols or add Wilds, which Millionaire Mystery Box does not have
Cons
No Hot Seat Free Spins Gamble, unlike Millionaire Megapays
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4. Millionaire
Studio Big Time Gaming Released November 2018 Layout 6 reels, 117,649 Mechanics Megaways, Cascading Reels, Multiplier, Gamble Feature
The original Millionaire sets the formula of the series: Megaways reels with an extra reel, reactions that chain wins, and the Hot Seat Free Spins Gamble, where you answer A, B, C or D with Lifelines to climb a ladder of free spins. The free spins multiplier grows with every reaction, without limit. It is rated high volatility.
Pros
The Hot Seat Free Spins Gamble, unlike Millionaire Rush
Megaways reels with reactions, unlike the Megaclusters grid of Millionaire Rush
Cons
No jackpots, unlike Millionaire Megapays
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5. Millionaire Mystery Box
Studio Big Time Gaming Released November 2019 Layout 5 reels, 243 paylines Mechanics Multiplier, 243 Ways, Mystery Symbols, Wild Multipliers
Millionaire Mystery Box is the classic edition of the series, on five reels and three rows: Mystery Box symbols all turn into the same symbol, Wilds double the wins, Free Spins climb a multiplier ladder, and a double or nothing gamble follows any win. It is rated medium volatility.
Pros
Medium volatility, steadier than the original Millionaire
A double or nothing gamble after any win, unlike Millionaire Rush
Cons
Far fewer ways to win than the original Millionaire
Who Wants to Be a Millionaire Slots in Release Order
5 games reviewed on BonusTiime so far, from the oldest to the newest. Each card opens the full review with a free demo.
Compare Who Wants to Be a Millionaire Slots on RTP and Max Win
Values from each game's review page. Sort the table to find the version that suits how you play.
Sort by
| Game | RTP | Max win | Volatility | Our rating |
|---|---|---|---|---|
 Millionaire MegapotsMar 2026 |
96.50% – 96.58%by version** | 91,000x | High | 8.1 |
 Millionaire MegapaysAug 2021 |
96.38% | 72,310x | High | 8 |
 Millionaire RushJun 2022 |
96.44% | 55,060x | High | 7.6 |
 MillionaireNov 2018 |
96.30% – 96.32%by version** | 50,000x | High | 7.3 |
 Millionaire Mystery BoxNov 2019 |
96.64% | 12,000x | Medium | 6.1 |
** The studio publishes several RTP configurations: the casino chooses which one it runs.
Which Who Wants to Be a Millionaire Slot Should You Play?
Two ways into the series, depending on what you are after.
Casinos with Who Wants to Be a Millionaire Games
These top-rated casinos offer games from Big Time Gaming, the studio behind the series. Which Who Wants to Be a Millionaire titles each casino carries can vary by casino and by country: check the game lobby before you sign up.
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Team's Choice 
Stake
Exclusive Bonus
€30 Free
Creation date: 2017
BONUSTIIMECopied -
Slot Hunter
Welcome Bonus Package
Up to €4,000 + 250 Free Spins
Creation date: 2020
HOLSTER1Copied -
Lucky Block
Welcome Bonus
200% up to €25,000 + 50 Free Spins
Creation date: 2022
*********No code needed
Who Wants to Be a Millionaire at a glance
- StudioBig Time Gaming
- Games reviewed5
- First releaseMillionaire
- Latest releaseMillionaire Megapots
What Is the Who Wants to Be a Millionaire Series?
Big Time Gaming’s Who Wants to Be a Millionaire slots bring the licensed game show into the studio’s slot maths. The original game combines the format used in Megaways slots with Dual Reaction.
Before the original game’s free spins begin, you enter the hot seat for a gamble that can increase the bonus allocation to 50 free spins. The free spins feature has an unlimited multiplier and unlimited retriggers.
Megapays and Megapots: The Jackpot Games
Millionaire Megapays is a six-reel video slot with four progressive jackpots: Mini, Midi, Major and Mega. Among progressive jackpot slots, Millionaire Megapays combines its jackpot feature with a double up gamble. You can trigger the Megapays Feature from any bet, with higher stakes increasing the chances of triggering the feature. The double up gamble lets you stake the total free spins win, returning you to the hot seat with that accumulated amount at risk.
Millionaire Megapots uses Coins to trigger its Hold and Spin feature: landing 6 or more starts three respins. During the feature, every symbol becomes its own reel. Coins award prizes, multipliers or Megapots icons. Those icons lead to the Mini, Midi or Mega jackpots.
In Millionaire Megapots, three Millionaire Scatters open the Hot Seat Free Spins Gamble, where you can climb to 50 Free Spins with safety nets and Lifelines. During Free Spins, the multiplier starts at 1 and grows with every Coin that lands. Millionaire Megapots also offers Power Play, which guarantees at least 10,000 Megaways on each spin. A Bonus Buy is available in Millionaire Megapots too.
Mystery Box and Rush: Other Formats
Millionaire Mystery Box uses a 243 ways format with a land-based feel. During play, a random Mystery Box can reveal any symbol, including scatters and wilds. In the free spins round, a ladder awards both a free spins multiplier and extra free spins.
Millionaire Rush uses Megaclusters, with symbols that split and react across a playing area containing up to 100 symbols. Alongside that changing symbol layout, you encounter a MegaTrail with 12 rungs, randomly set on every base game spin rather than remaining fixed between spins. In the free games, the ladder can be set up for up to 99 free spins.
FAQ
Who Makes the Who Wants to Be a Millionaire Slots?
Big Time Gaming makes the Who Wants to Be a Millionaire slots, which bring the TV quiz show to the studio’s slot maths.
Which Millionaire Slot Has a Bonus Buy?
Only Millionaire Megapots. It also has Power Play, a mode that guarantees at least 10,000 Megaways on each spin.
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