Devil’s Number Slot Review: Features, Rules and Payouts

Devil’s Number game artwork by Red Tiger

Devil’s Number makes the Mark of the Beast a conditional editor of the reels. When a high-paying symbol forms a winning line, it may be upgraded for that spin; when a low-paying symbol wins, it may be removed after paying, setting off a cascade without that symbol.

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Devil’s Number at a glance

Provider	Red Tiger
Genre / theme	Horror
Game type	Video slot
Reels / grid	4x4x4x4x4
Reference RTP	96.06%
Volatility	14.84
Payout mechanic	Lines; up to 30
Maximum win	2,520x the bet
Release date	10 April 2019
Main features	The Mark upgrades winning high symbols or removes low ones; both effects evolve in Free Spins.

RTP and stake limits can vary by version and market. Check the information screen in the game you open. Maximum win is a ceiling, not an expected result.

A line game altered after a win

The recorded board has five reels and four rows, with line wins on up to 30 lines. The source does not provide a complete paytable, so the exact value of each ordinary combination is not available here. The Mark of the Beast can intervene conditionally. If a line of high-paying symbols wins, it may burn and upgrade that symbol for the current spin; if a low-paying line wins, the symbol may be removed after its payout and cascading tiles follow. Those cascades exclude the removed symbol. This means the feature changes the remaining reel contents after the original win rather than retroactively replacing the initial result.

Free Spins change the persistence rule

The Nine is the Free Spins Scatter and appears only on reels two, three and four. Three Scatters trigger 12 Free Spins. In the bonus, the first time high-paying symbols form a winning line, they pay normally and are then upgraded for the remaining Free Spins. The upgrade thus persists across later rounds rather than being limited to the triggering spin, as in the base-game description. A low-paying win follows a different path: those symbols are removed from the reels for the remaining Free Spins and also initiate cascades on the spin when removal occurs.

This creates a lasting change to the bonus symbol pool. High symbols that have won once can return in upgraded form, while low symbols that have been removed cannot appear in later Free Spins. The source does not specify whether each symbol can be upgraded more than once, how many low symbols can be eliminated, or what happens if a cascade produces another winning line of the same category. It also does not describe retriggers. These omissions matter because persistence compounds over several rounds: the rules establish that the reel set can change for the rest of the feature, but do not establish a cap or full sequence for those changes.

Configuration and assessment

For this standard Red Tiger record, RTP is 96.06%, volatility 14.84, and the maximum payout is 2,520x. The layout is 5×4 with up to 30 lines. The official description calls the game high-volatility, while the detailed math record supplies the numerical volatility value 14.84. Those are two source presentations of the same configuration, and the numeric record is retained without treating the label as a separate scale or making comparisons the data cannot support. The 2,520x cap is a maximum, not an expected result; no probability for the Free Spins trigger or maximum win is supplied.

The design’s strength is the contrast between temporary base-game changes and persistent bonus changes. It gives the Mark of the Beast a different role in each mode and lets the Free Spins reel set evolve as high symbols upgrade and low symbols disappear. The limitation is that these changes are random and the exact upgrade ladder and cascade limits are not documented. That makes the concept understandable but leaves important details about its reach open. The fixed 12-spin trigger is known; how much the reel transformations can improve those rounds is not quantified.

Strengths and weak points

Strengths

The bonus gives high and low symbols distinct persistent roles: winners upgrade for later spins, while removed low symbols stay out and alter subsequent cascades.

Weaknesses

Random interventions, unspecified upgrade steps and missing cascade or retrigger limits make it difficult to quantify how far the bonus can evolve.

Our Editor’s View

Devil’s Number offers a clear thematic mechanism with two distinct kinds of alteration: winning high symbols can become more valuable, while low symbols can be removed to reshape later outcomes. In the base game those effects are conditional and temporary; in Free Spins, upgrades and removals persist for the remaining rounds. That shift gives the bonus a specific identity, but its exact strength is hard to assess because the upgrade mapping, cascade limit and retrigger rules are absent from the available detail.