Devil’s Number (Red Tiger): Review
Even if the possible outcomes look infinite, there are still hard boundaries to what slot games can achieve. No matter how talented the mathemagicians may be, a game can’t break free from the random number generator or sidestep the constraints of the theoretical return to player. Visually, though, designers can push far beyond what numbers alone can express. Sadly, many studios hesitate to take risks; in a business driven by profit, the safer route often wins.
Devil’s Number is the opposite of safe. Developed by Royal Studio and powered by Red Tiger, this title stands out sharply among the overly cheerful, cookie-cutter themes that crowd most digital lobbies. Devil’s Number is a sinister 5×4, 30-payline slot focused on symbol upgrades and symbol removal, playable on any device with stakes ranging from 0.20 and 40€ per spin.
Love the wicked vibe or not, the creativity is hard to ignore. The comic book-style artwork is executed with real flair, and the ominous atmosphere is designed to pull you in. The symbols match the story, featuring low-value A, K, Q, J and 10 royals alongside scrolls, spell-books and cauldrons. The standout icon is the potion bottle topped with a skull, paying 12 times your stake for 5 across a full payline.
Devil’s Number (Red Tiger): Features

Devil’s Number includes two base-game mechanics grouped under the Mark of the Beast. The first is an upgrade feature that can randomly trigger on any spin containing one of the premium symbols. When it hits, those symbols get an increase in value.
The second mechanic removes symbols. Any time you land a winning combination made up of lower-value symbols, there’s a chance a chain reaction will occur—every symbol involved in the win is cleared away, causing a cascade. This can open the door to another win.
The main attraction is the Free Spins bonus, activated by landing three 9-symbols on the middle reels, which then flip to reveal the number of the beast. At that point the pace ramps up, helped along by a heavy metal soundtrack. You begin with 12 spins and both Mark of the Beast features remain active for the entire bonus. And that’s only the start.
Whenever you score a win using an A, K, Q, J or 10 symbol, those symbols are removed permanently. Likewise, each win involving a premium symbol permanently upgrades that symbol’s value. The bonus can also be re-triggered for 6 extra spins by landing 3 more scatters.
Devil’s Number (Red Tiger): Verdict
Devil’s Number isn’t without drawbacks, most notably the fairly modest 2000 xbet potential and a base game that can feel a little underpowered, yet it makes up ground with strong style and plenty of personality. The free spins round is where it truly comes alive and delivers the most engaging rush.
The dark presentation won’t suit every taste, and not everyone will connect with what we consider standout artistry, but there’s still plenty here to justify giving it a spin or two. Overall, we see Devil’s Number as a solid slot and a lyrical oddity that steps beyond the usual formula while still respecting the classic foundations of online slots.
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ProviderRed Tiger
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RTP96.06% (Default)
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VolatilityHigh (5/5)
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Reels5
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Rows4
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Paylines30
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Min/Max Bet0.20/40
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Max Win2,500x
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Hit Freq2/5
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Release DateOut Now