Millionaire Mystery Box Slot Review

(3 votes)
Modern slot provider 7-digits jackpot Multi-Paylines slot
Millionaire Mystery Box Details
Release Oct 2019
Provider Big Time Gaming
Max. RTP ---
Reels 5
Paylines/Ways 243
Betting Range (€/$) 0.20 - 100
Max. Payout 1,200,000
Progressive Jackpot No
Megaways No

A new game, which is going to be released by Big Time Gaming, Millionaire Mystery Box is a slot with a theme that’s based on a popular TV show, called Who Wants To Be A Millionaire. The game’s features are a major reason why you’d want to play it, mostly as a result of huge multipliers being a possibility inside. More on this below.

Millionaire Mystery Box will feature 5x3 reels, gets 243 ways to win, and through them you could potentially get paid as much as 12,000x total stake, in a single round. It’s with free spins, up to 50x multipliers, scatters, Mystery Box Reveals and wilds, that this is possible. Once you add the Medium volatility of the game, you should have plenty of excellent reasons to want to give it a shot.

Betting and Prizes

The game’s wagers will start you off at a minimum of just $0.20, but there is the possibility to spend quite a bit more, even up to $100 on a single spin. Given the 20 coins which seem to be involved, the slot’s line bet will reach $5.

You might not be excited about the game’s individual winning combinations, but the base game isn’t the one with the best potential here, it’s the free spins that do that for you. With enough scatters collected, the multipliers can reach 50x in that mode, and this makes possible top wins of up to 12,000x total stake, for a single round.

Despite the excellent potential of this new BTG slot, the volatility appears to be only Medium, which is one more reason why a lot of players will like it.

Millionaire Mystery Box Slot Features

Before we get to the exciting features, the ones with big multipliers, we will take a look at the wild symbol. This one has a 2x multiplier of its own, which it uses whenever it is part of a new winning combination, as a substitute. Should several wilds contribute to a win, they multiply those values, and you could end up with huge boosts to your wins.

Millionaire Mystery Box is a random bonus game, which will deliver random symbols, including scatters or wilds.

The most excitement appears to originate from the game’s free spins though. Triggering them via 3+ game logos, the slot’s scatters, you win 7 free spins initially. As you get scatter symbols in this mode, they are collected, and you get a higher multiplier. Each additional scatter also gives you 1 or 3 additional free spins, besides the boost to the multiplier. In total, if you get 11 scatter symbols, you receive an additional 17 free spins, for a maximum of 24 rounds, plus a multiplier of 50x is reached for the last few spins.

Theme & Design

With inspiration coming from a TV show, the game’s graphics are fine, but not spectacular. You still have the Royals there, and the game makes use of four gemstones as well, so the symbols you’re seeing along the way are not very interesting. They add the wild mystery box and the game logo as the scatter, but those don’t do much either. It’s mostly in the surrounding design, that you see the connection to that TV show.


Millionaire Mystery Box looks like a fun game to play, and it’s all due to its features, huge multipliers and big top payouts. Its graphics don’t seem to contribute all that much.

Millionaire Mystery Box Slot Machine FAQ

❓ What is a key options of the Millionaire Mystery Box slot?

✔️ Slot developer: Big Time Gaming , 5 reels with 243 paylines , Betting Range (€/$): 0.20 - 100 , Max Payout: 1,200,000 .

❓ Where can I play Millionaire Mystery Box?

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❓ Can I play Millionaire Mystery Box slot on my phone?

✔️ Yes, it's absolutely mobile-friendly!

❓ Where can I play this slot machine free?

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