Diamond Inferno: Expanding Reels, Respins and Multiplier Trail

Diamond Inferno grows from three rows and twenty paylines to six rows and fifty lines during winning respins. Only after the full grid opens does its multiplier progress towards ten times. Its diamonds pay a separate cash scatter award, whose value depends on row height, so this guide follows both the changing board and the payout units.

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Reviewed by Brian Taylor
Published: December 2018

How the expanding reels progress

A win awards a respin and opens another row, adding ten lines. The grid can grow from 5-by-3 to 5-by-6. Once the full grid is open, further wins advance the multiplier trail, up to 10x. The order is important when comparing other fire-themed games: first the reel area grows, then the multiplier develops.

Look for that win-triggered sequence in an alternative’s rules. Randomly added wilds, a separate free-spins bonus and a losing-spin respin are different features even when the artwork uses the same flames and diamonds.

Rules: FanDuel’s Diamond Inferno game guide; studio and launch mechanics: Microgaming’s launch announcement.

Follow the rows first, then the multiplier

A paid spin starts on the bottom three rows with twenty lines. A win awards a respin at the same bet and exposes one additional row before the next result. The next stages therefore have four rows and thirty lines, five rows and forty lines, then six rows and fifty lines. The changing line count follows the board expansion; it is not an extra charge for each newly exposed row.

The multiplier progression begins at full height. Its steps are 1x, 2x, 3x, 5x and 10x, rather than rising by one all the way to ten. A winning sequence that stops while the board is still opening has not reached those later steps. Rows revealed and multiplier reached should be followed as two separate parts of the round.

For an illustrative sequence, imagine wins on the opening three-row board and the next two expanded results. The fourth result is then played with the six-row board. If that result does not win, the sequence cannot continue climbing simply because all fifty lines were visible. The respin condition still matters at every stage.

Newly exposed positions can change which routes connect, but similar symbols anywhere in the taller window are not automatically winners. Ordinary line combinations still begin on reel one and follow a qualifying route. A wild can substitute for regular symbols; it cannot replace a diamond scatter. Read the highlighted line or scatter result before applying the multiplier.

Games like Diamond Inferno

Diamond Inferno has numerous games with similar theme and features, here are the best matching games, they include Fire & Ice, Fire Queen, Flaming Fox and 7s To Burn.

Fire and Ice is the IGT setting comparison in this group. Its linked review describes a five-by-three, twenty-five-line release and a separate free-spin feature. Diamond Inferno instead starts with twenty lines and develops through consecutive winning respins. That timing is the useful distinction: a fixed allocation of bonus games is different from another respin conditional on the previous result. Read the offered Fire and Ice help before assigning any special rule to its fire or ice symbols. Wild Fury is another separate catalogue link. A relative RTP comparison or medium-volatility label does not establish a balanced session or the same expanding-row sequence.

Fire Queen has a more distinctive structure than the old generic five-reel entry suggests. The cited WMS game help refers to paired reel columns and a centre section, with wilds transferring to corresponding positions in the other column before wins are evaluated. Its bonus can hold the matching symbols that triggered it, while centre-section wilds expand. This is a different positional system from Diamond Inferno exposing one new row after a win. Follow the exact offered Fire Queen layout rather than importing a blanket five-by-three description. Fire Light and Phoenix Fire remain separate setting links; their names do not establish the same transfers or bonus conditions.

Flaming Fox uses Red Tiger’s fire effects to synchronise selected tiles or reels. The supplier describes fired tiles spinning together using high symbols and wilds; hitting an already fired tile can turn it into a locked wild. Its current listing shows ten lines on a five-by-three board, with its own fixed route set. During free spins the fired tiles remain through the feature. Compare that retained pattern with Diamond Inferno’s expanding rows and finite full-height multiplier ladder. Fire Horse is another linked animal-setting suggestion. The fox’s transformations are feature rules, not evidence that patience or a volatility label will make a larger win arrive.

7s To Burn is the compact classic-symbol comparison in the catalogue, with three reels and five lines in the linked review. It changes the board format substantially from Diamond Inferno’s five reels and expanding rows. Read its 77 wild, burning wild and any Hi Roller or gamble instructions in the offered version before treating a symbol value as an overall limit. A gamble option concerns an existing award or a separate mode; it is not the same as a respin awarded after a Diamond Inferno win. 7s On Fire is another separate title. Neither the shared fire motif nor an old medium-low volatility label establishes steadier results.

The twenty-five-line format in the linked Fire and Ice review makes the payline map the first comparison to check. A row of matching symbols needs to lie on a purchased route; the number of visible positions alone does not establish a win. Diamond Inferno changes its active route set as higher rows open, so its opening screenshot is not a line diagram for Fire and Ice. A separate free-spin allocation should also be followed using its own counter. The historical catalogue rank is navigation information, not evidence that one game performs better for an individual player.

Fire Queen’s operator help distinguishes two trigger combinations, producing different initial free-spin allocations. It also describes retriggers from the centre-section Feature symbols, rather than from the held symbols in the paired columns. The placement of a symbol therefore matters alongside its name. In Diamond Inferno, three diamonds on the required reels produce a row-valued cash award instead of a fixed free-spin allocation. These are materially different triggers. A shared flame effect or an expanding wild cannot establish that Fire Queen has Diamond Inferno’s 1–2–3–5–10 trail.

For a Flaming Fox illustration, imagine two marked tiles spinning in sync. Their linked result concerns the symbols supplied to those particular positions. A locked wild at one tile is a further transformation; it does not imply that every unmarked tile is wild. Red Tiger’s free-spin rules retain fired tiles until the bonus ends, which is persistence across separate spins. Diamond Inferno’s higher rows instead remain part of one winning-respin sequence. Those distinctions explain why synchronised positions, held wilds and an expanding grid should be compared separately rather than grouped as identical random features.

7s To Burn reduces the visible layout to the classic three-reel format described in the linked archive. Five active lines are five defined routes, not five independent boards or five automatic prizes. Use its paytable to distinguish the regular sevens from the named wild symbols and any separate gamble control. Diamond Inferno’s row-growth arithmetic cannot be transferred to that smaller screen. The older catalogue stake and return figures also need the offered game’s own units and configuration. This is a comparison for a simpler visible format and different special-symbol rules, rather than an unsupported claim of lower risk.

If you enjoy Diamond Inferno, try these

One may think that the slot Diamond Inferno is a diamond themed online slot due to its title. Now that is not completely incorrect as there are flashes of diamonds in the theme. However, Microgaming built this slot with largely a fire-themed game with some classic feel.

The developers put in the required work when it comes to graphic designs and quality. It also has some stunning animations and visuals and the soundtrack in the background is also great. The reels are set right in the middle of flames with symbols such as diamond coins, stars, bars, and cards.

This is not the only fun fire-themed online slot. Players can also check out other slots with the same vibes from other developers. They include Fire Department, Stunning Hot, Hot To Burn, and Heart Of Earth.

The diamond award depends on its row

The cited game help requires three active diamonds on reels two, three and four for the cash scatter award. Their row values, counted from the bottom, are 1, 2, 4, 6, 10 and 20. Only exposed positions take part. Add the three row values, multiply by the total bet and then by the current win multiplier. This is separate from the ordinary line prizes.

For a worked example at a £0.20 total stake, take diamonds in the first, second and third rows on the required reels. Their values add to seven. At 1x the cash scatter award is 7 × £0.20, or £1.40. The seven is a sum of row values, not seven diamonds, seven paylines or seven free spins.

For a full-height example, use row values four, ten and twenty with a current 3x multiplier and the same £0.20 stake. The calculation is (4 + 10 + 20) × £0.20 × 3, giving £20.40. A separate qualifying line win is added on its own terms. These illustrative positions explain the arithmetic; they are not a claim about the chance of that result.

There is no fixed free-spin allocation attached to that diamond trigger in these rules. A cash-paying scatter and a win-triggered respin can appear in the same sequence, but they do different jobs. That distinguishes Diamond Inferno from a game where three scatters launch a separate batch of bonus spins.

The screenshot below captures one point in an expanding round. It cannot establish a universal maximum payout or the probability of reaching ten times. FanDuel describes a specific offered configuration with an 11,750-times headline limit, while the cited help gives its own cash cap. Read the current game’s limit and units instead of treating either operator figure as universal.

Diamond Inferno’s setting combines flames, gems, fruit and sevens. Its round develops through winning respins and grid expansion, rather than a progressive jackpot. The fire-themed links below are setting suggestions; the closer feature comparisons need to distinguish the cause of a respin and when the multiplier begins.

Brilliant Fire themed slots

Diamond Inferno is a Fire themed slot game. Other Fire themed slots are Stacked Fire 7s, Hot N Fruity, Hot Nudge and Firefly Frenzy.

If you enjoy Diamond Inferno from Microgaming, try these

Diamond Inferno comes from Microgaming. In 2004 it was first to market again, this time with mobile casino software. In 2022 the catalogue passed to Games Global, which now handles its publishing and distribution. The studio goes all the way back to 1994, when Martin Moshal started it on the Isle of Man. Microgaming built the original online jackpot network, which has since handed out more than €1 billion. More Microgaming slots sit just below if you want to keep exploring.

Microgaming is one of the top online slot manufactures, online game providers, and an overall tech and entertainment company. The company is one of the most known especially for some of its slots that have many positive rates.

It is also one of the companies that have been in the industry for the longest. That is since its foundation in 1997. It is therefore one of the companies that has seen change, technology, and the industry evolve from one level to the next.

They now use this knowledge and experience to ensure they create the best and highest quality of games. Some of their best titles are Fruits vs Candy, Girls With Guns, Happy Holidays, and Gopher Gold.

We’ve listed The top Microgaming online slots to play, these slots are all developed by the same game provider as Diamond Inferno, they include Hot As Hades, Wild Orient, Roman Power and Meerkat Mayhem.

Key information on Diamond Inferno

Rule sources for the explanations and edition comparisons: Diamond Inferno operator rules, fanduel new casino games spotlight diamond inferno, Red Tiger flaming fox, Fire Queen operator rules.

Here is a table of key information about Diamond Inferno.

Diamond Inferno’s original fire-and-gem screen. The respin sequence exposes higher rows before the full-height multiplier trail advances.

Further respin and multiplier comparisons

The categories below provide related features to compare. Diamond Inferno’s own respins follow a win. Games in the no-win-respin category use a different trigger, so check that distinction rather than treating them as mechanical copies.

Compare loss-triggered respins

Other matching slots with No Win Respins are Gemtastic, Le Kaffee Bar, Poltava Flames Of War and Mayana.

Games with Additional Paylines

The top slots with Additional Paylines are Joker Stacks and Extra Juicy.

Online slots with Increasing Multipliers

The top slots with Increasing Multipliers are Joker Stacks and Extra Juicy.

Diamond Inferno slot sites FAQs

Diamond Inferno Pros and Cons

A quick look at the main pros and cons of Diamond Inferno, based on its RTP, volatility, features, ranking and gameplay.

Pros

• The grid expands before the multiplier trail develops
• Diamond cash awards use the total bet and row values
• Winning respins use the triggering bet
• Gameplay adds a respin feature for extra chances after a spin and an increasing multiplier mechanic
• The cited configuration gives a 96.19% RTP

Cons

• A sequence needs another qualifying win to continue
• The diamonds and microgaming theme won’t be for everyone
• The bonus sequence develops through winning respins