Millionaire Rush

Editor's rating:
Published: June 10, 2022|Updated: June 16, 2022

Millionaire Rush Slot Review (Big Time Gaming)

Big Time Gaming brings you one of the juiciest MegaClusters slots yet – Millionaire Rush.

It also happens to be the first slot with a MegaTrail, which hosts no less than 12 bonus prizes. That includes a top prize of up to 1,000x in the base game and 2,000x in the Free Spins bonus. Together with up to 100 symbols on the screen at once, this cluster-pay slot is designed to be a fast-paced thriller. And that includes the element of fear as it is a very high-variance game with a maximum win target of 55,060x.

Millionaire Rush is the fourth edition of the branded series, including Mystery Box and MegaPays editions. You will find it at licensed UK slot sites like Betfred as well as other casinos after the wide release on 22 June 2022.

Play Millionaire Rush at Licensed Slot Site
Recommended BTG casino

Betfred Games
Welcome bonus
Stake £10, Get 100 Free Spins on Starburst
Play here

New customers only. Register with code GAMES100. Deposit and stake £10 or more to receive 100 Free Spins on Starburst. Free Spins credited within 48 hours. Free Spins are valid for 7 days. E-Wallet & Card restrictions apply. SMS validation may be required. No wagering requirements. Further T&Cs apply.

MegaClusters Base Game

Since everything is Mega that Big Time Gaming creates, the addition of MegaClusters means that there are no standard pay-lines in this release. Introduced by Star Clusters in June of 2020, Millionaire Rush is the fifth BTG slot using this mechanic. Initially played with 5 rows and 5 columns, all winning symbols will split and react. If it’s one of the larger symbols that happen to react, they will each be replaced by 4 smaller ones.

There are 7 gem symbols that will only pay for a cluster of 5 symbols that match either horizontally or vertically. If all of them split, there will be a whopping 100 symbols on the screen at once. By MegaClusters standards, it is the lowest you can get or the same as in Diamond Fruits.

What this branded title has going beyond all other slots of this class is the new MegaTrail.


Millionaire Rush MegaTrail max win.
Rung 12 will offer a chance to win up to 1,000x in the base game.

The new MegaTrail is visible throughout gameplay and it has 12 rungs with randomly determined bonuses. Each new spin will generate at least 3 random bonuses, whereas rung 7 will always award 6 Free Spins. To move up one level, a win has to occur, which could also be a regular avalanche or reaction. Note that Rung 1 of the MegaTrail is always blank in the base game, and Rung 2 will always contain a random bonus.

There are 12 types of Random Bonuses:

  1. Wilds – Up to 10 Wilds are randomly added.
  2. Multiplier Wilds – Wilds with up to x5 Multiplier are added.
  3. Symbol Explosions – Every instance of the displayed symbol will remove all symbols in its row or column.
  4. Symbol Subdivide – Every big instance of the displayed symbol will turn into 4 smaller symbols of the same type.
  5. Symbol Upgrade – Every instance of the displayed symbol will upgrade to the symbol indicated.
  6. Symbol to Wild – Every instance of the displayed symbol will become a Wild.
  7. Mega Wild – A grid of 4 Wilds will be added to the screen. Two grids of Wilds are added in the Free Spins.
  8. Win Multiplier – A Multiplier for the entire spin is incremented by up to x10. Bonus Prize is not multiplied.
  9. Explosions – Up to 3 explosions, in the shape indicated, will remove symbols from the screen.
  10. Symbol Duplication – Five big instances of the displayed symbol will be added in a row or column.
  11. 50:50 – All of the symbols in the top, bottom, left or right half of the screen will be removed.
  12. Max Megaclusters – All big symbols are replaced by 4 smaller symbols.

👍 Tip: If you’re a math geek then the game’s standard deviation is 28.879, which is similar to Gold MegaWays which has an SD of 27.99.

What to expect from MegaTrail? You will fairly regularly climb up several rungs and activate a few of the boosters. However, they all add up very little since the payouts are so small. Also, the maximum possible MegaTrail award of 1,000x in the base game is often just not enough to break even the costs of getting there in the first place.

Rung 7 with the Free Spins is a probability that happens around every couple of hundred spins or so. And as to be expected, MegaTrail also shines in all its glory in the main bonus.

Free Spins Bonus

Millionaire Rush bonus game.
Free Spins bonus with all 12 rungs full of features (rare)!

Once you get 6 wins or reactions in a row, you’ll win 6 free spins with an enhanced MegaTrail that will be randomly determined before the bonus round starts. A minimum of 6 bonuses will find their way there, including Rung 1, and they won’t get shuffled on every spin. Plus, Rung 12 will have a 2,000x bonus prize. Never happened to me in Free Spins but I did manage to get it right to the top in the base game, twice.

Also, when you reach Rung 7, you’ll win +3 Free Spins. The maximum number of total Free Spins is 99. Unlike Wild Portals or Golden Catch, there is no Win Exchange or bonus buy in this game.

Millionaire Rush Free Spins re-trigger.
Get to Rung 7 in the bonus to win extra spins.


Editor's rating:

Millionaire Rush is by no doubt the most complex game of the WWTBAM series comparable to some extent to another MegaClusters title Cyberslot. Many BTG slots are volatile as hell but this one feels especially hard since 100x wins in the base game are pretty much unseen without reaching the top of the MegaTrail. And by then you are very likely to have lost a substantial portion of your starting balance. The MegaTrail is nice, and it keeps the base game very interesting and all, but I find myself in between disbelief being regularly thrown very small wins and the rush of excitement when approaching the free spins or, in those extremely rare instances, the top rung. That is the reality which you must face if you choose to play this slot. Prepare for the long haul and start with the lowest bets. Better yet, play Golden Catch instead, where the studios did a much better job at balancing the math.

Betfred Games
Welcome bonus
Stake £10, Get 100 Free Spins on Starburst
Play here

New customers only. Register with code GAMES100. Deposit and stake £10 or more to receive 100 Free Spins on Starburst. Free Spins credited within 48 hours. Free Spins are valid for 7 days. E-Wallet & Card restrictions apply. SMS validation may be required. No wagering requirements. Further T&Cs apply.

About Our Reviews

Full disclosure: is an affiliate site which provides free information about online slots, slot sites and everything related. Some of the links on this site are affiliate links, so we may earn affiliate commission from casinos when someone makes a deposit through our site.

Note: We have never and will never do paid reviews. This means that both the casinos and game developers are seeing the reviews when they are published for the first time, right alongside you. We do not send them the reviews for an early look, so everything we say is our honest opinion. Should we ever do a paid article, it will not be a “review” and we will make sure to mark it as a sponsored article or an “ad”.

Can you trust reviews? I hope so, because at the end of the day I want you to be happy with the casino or slot that you choose. But I also encourage you to look at other trusted sites which may have different opinions. If you decide to look around then make sure that it is a trusted source because it is common practice for casino operators to have their own “review sites” which are biased, not to mention the sites which have reviews written by people who are not following the industry.

Now that you know how we run things here, thank you for your supporting independent sites like us. If you have any questions, just send me an email.

Nikita, Founder and reviewer at

Big Time Gaming slot reviewsSee all

See more Big Time Gaming slot reviews

96.70%- 96.72%
See all
Recommended Big Time Gaming casino
Betfred Games