Devil’s Number

Devil’s Number Slot Review

Candlelit shelves, a checkered marble floor and a horned statue on a pedestal: Devil’s Number stages its occult library at night with more care than most slots spend on their entire bonus rounds. And that’s the honest pitch, because this is a game that puts its imagination into the artwork and the base-game burn rather than into big numbers. It gets away with it more often than it should.

Red Tiger‘s five-reel, four-row build runs at 96.06% RTP with a hit frequency of 17.82% and a ceiling of 2,520x the bet. That’s a tamer number than the studio’s other trips to the dark side, with Transylvania Night of Blood, Lucky Little Devil and Ouija all chasing bigger sums. Still, the Mark of the Beast gives the base game a sting that most 5×4 slots don’t bother with.

The Base Game

Devil’s Number plays on a 5×4 grid. Stakes range between 0.1 and 50 per spin. The reel set leans hard on the theme: cauldrons, dragons and scrolls fill the premium end, while the royals A, K, Q, J and 10 handle the small stuff.

Symbols can stack, and they stack tall. A full column of the skull cauldron can occupy the middle reel from top row to bottom, filling all four rows of a single reel with one symbol. When a stack like that lands adjacent to matching symbols, several win lines pay at once from what looks like a single tower of symbols.

The setting is more than a backdrop. A grinning skull sits on a shelf at the frame’s right edge, next to a half-hidden stone figure. A quill and scattered papers rest on a desk in the lower corner, lit by a warm lamp, and a red patterned runner sits below the reels themselves. The whole scene is rendered in lush comic-book illustration, bold outlines and warm orange light against deep shadow.

One detail on the floor matters more than the rest. Beneath the reels lies a large red ornate circle with swirling patterns, and it belongs to the Mark of the Beast, the symbol that drives both base-game modifiers. When it intervenes, the burn is visible and immediate.

The paying symbols divide into two tiers, and each premium has a plain and an upgraded version. The plain values, as multiples of the line bet, are:

• Flaming skull cauldron: 3 pays 3x, 4 pays 6x, 5 pays 12x
• Blue cauldron: 3 pays 1.4x, 4 pays 3x, 5 pays 6x
• Purple dragon: 3 pays 1.2x, 4 pays 2.5x, 5 pays 5x
• Scroll: 3 pays 1x, 4 pays 2x, 5 pays 4x

The royals A, K, Q, J and 10 make up the low-paying tier and sit below everything in that list. A three-of-a-kind scroll win pays 1x the line bet. The royals also happen to be the symbols the Mark of the Beast targets for removal, which tells you where the game’s contempt lies.

Upgraded versions of the four premium symbols pay more than the figures above. How much more is the game’s own secret; the two versions sit in the paytable side by side, and the upgraded numbers are the ones worth chasing. Only an Upgrade intervention puts them on the reels, so every appearance is earned rather than given.

The Mark of the Beast

Both of the game’s modifiers hang off one symbol, and together they cover the two ends of the paytable. In short:

• Trigger, high-paying win line: the mark may burn and upgrade the winning symbol for the current spin
• Trigger, low-paying win line: the mark may remove the winning symbol after it pays
• Upgrade effect: upgraded symbols pay more than their non-upgraded versions
• Remove effect: cascading tiles drop in, and none of them will be the removed symbol

Upgrade

When a win line lands on high-paying symbols, the Mark of the Beast may burn that symbol and upgrade it for the current spin. Upgraded symbols pay more than their non-upgraded versions, so a single upgraded line can outperform several ordinary ones.

The upgrade lasts for that spin only, which keeps it sharp. There’s no meter filling, no symbol staying hot into the next drop; the burn happens, the line pays at the higher rate, and the reels reset. What it adds to any given win is bounded, but the top of the paytable is where the game’s real money sits, and this is the only door to it.

Remove

The same mark handles the low-paying symbols, but in the opposite direction. When a win line lands on low-pay symbols, the Mark of the Beast may remove that symbol after it pays, triggering a cascade of new tiles. Those cascading tiles won’t include the removed symbol, which thins out the royals for the follow-up drop.

Walk it through and the steps are: the royal line pays, the mark burns the winning symbol off the reels, fresh tiles cascade into the empty positions, and the refill is drawn without the symbol that was just removed. If the new tiles form another win, it pays too, and the sequence continues from there.

That exclusion is the clever part. A cascade in most slots replaces like with like, so a royal-heavy board stays royal-heavy. Here the removed symbol is banned from its own refill, meaning the drop that follows is drawn from a better pool: the premiums, the mark itself, and whatever royals survived.

It’s a tidy pair of modifiers. One enriches what already pays well; the other strips away what doesn’t, giving each cascade a better class of symbol to work with. Neither is guaranteed, and both arrive on the game’s timing rather than yours.

Free Spins

There is a free spins round in Devil’s Number. Beyond its name, the game gives nothing away about what it awards, how it triggers, or what changes once you’re inside it, so there’s nothing honest to add beyond that.

What can be said is structural: the round exists alongside the two Mark of the Beast modifiers, and the modifiers are the part of this game that behaves differently from a standard 5×4 slot. The free spins round is the closed book on the shelf, and this is a library that keeps a few of them.

Our Honest Verdict

Overall Rating: 7/10

This is a slow burn in a room built for slow burns. You sit in the library, the reels go quiet for stretches, and then a symbol catches fire and the whole board rearranges itself. That burn is why you’d pick Devil’s Number over the hundred other gothic 5×4 slots: no other game’s devil despises its own royals quite so usefully.

Where it’s clever is the pair of Mark interventions, because the removal doesn’t just tidy the board, it stacks the next drop in your favour. Where it’s thin is everything past that: the free spins round is a closed book, the best line pays 12x, and a 2,520x ceiling won’t pull anyone away from Red Tiger’s hungrier monsters.

If you like a slot where the theme and the mechanics were clearly designed by the same person, this is one of the better nights in that library. If you play for ceiling, the candles here burn too low. For atmosphere-first players, though, the lamps stay lit.

Devil’s Number FAQs

• What is the RTP of Devil’s Number?

  Devil’s Number runs at 96.06% RTP, which sits just above the usual benchmark for an online slot.
• How does the Mark of the Beast work?

  The Mark of the Beast is Devil’s Number’s special symbol. On a win line of high-paying symbols it may burn and upgrade that symbol for the current spin, with upgraded symbols paying more. On a win line of low-paying symbols it may remove that symbol after paying, triggering cascading tiles that won’t include it.
• What is the hit frequency of Devil’s Number?

  The hit frequency is 17.82%, meaning roughly one spin in six produces a winning combination.
• What is the maximum win on Devil’s Number?

  The maximum win is 2,520x your bet.
• What is the grid size of Devil’s Number?

  Devil’s Number plays on a 5×4 grid, five reels wide and four rows tall.
• What is the minimum and maximum bet on Devil’s Number?

  You can stake anything from 0.1 up to 50 on a single spin.
• When is Devil’s Number released?

  Devil’s Number’s release date is 10 April 2019.
• Who makes Devil’s Number?

  Devil’s Number is made by Red Tiger.