In Ultimate KO, an Expanding Multiplier Wild turns a qualifying line win into a boxing contest between two possible multipliers. The defining choice is ordinary spins versus paying more for guaranteed Wild appearances or direct Free Spins access.
Demo availability may vary by location. You must meet the legal age in your jurisdiction; the free-play button does not record acceptance.
Ultimate KO is a very-high-volatility video slot from Riddec Games, released on 27 August 2026. The studio page describes a 3×3 grid with 5 fixed paylines, Expanding Multiplier Wilds from 2× to 100×, five Free Spins, Lucky Bet, Buy Bonus, and a printed maximum of 7,500× plus a separate $250,000 cash cap.
This card follows that listing, the attached help frames and demo. It is not a report of played cash sessions.
For adults of legal gambling age in their location. Set a budget you can afford to lose.
Read full reviewListed RTP is 95.14%. This card stores 95.14% as the displayed RTP and both ends of the published span. The studio also supports Dynamic RTP; very high volatility is the printed classification.
Wins need three matching symbols left to right on one of 5 fixed lines. A regular Wild substitutes for paying symbols but not Scatter. An Expanding Multiplier Wild only expands when it helps form a winning line, then covers its reel and presents two rival multipliers, one of which is applied.
Three Scatters award five Free Spins with at least one Expanding Multiplier Wild on every spin. Buy Bonus costs 60× the base bet for direct entry; Lucky Bet costs 10× per spin for a guaranteed Wild on that spin only.
This card suits readers who want a compact boxing theme and one central Expanding Wild idea. It is less suited to long bonus progression or frequent small line awards.
When the Expanding Wild forms part of a winning line, it covers the reel and shows two multipliers as rival boxers. One value is selected at random from the studio list: 2×, 3×, 4×, 5×, 6×, 7×, 8×, 9×, 10×, 12×, 15×, 20×, 25×, 50× and 100×. The losing fighter’s figure is not paid as a consolation.
Three Scatters start five Free Spins with a Wild guarantee each round. Buy Bonus opens that feature for 60× once. Lucky Bet charges 10× per covered spin for a Wild appearance without starting Free Spins, and it is disabled during a purchased bonus. Wild yes, free spins yes, Bonus Buy yes.
Very high volatility plus 10× and 60× paid options can stretch a budget quickly. Set money and time limits before spinning, and count each Lucky Bet spin or Buy Bonus purchase against the full session budget before confirming.
Budget Lucky Bet as a repeating cost
Five 10× Lucky Bet spins cost 50 base bets even if no Free Spins open. Count consecutive charged spins toward the stop limit.
Treat Buy Bonus as a full entry fee
A 60× purchase is paid before Free Spins begin. It guarantees the feature’s Wild appearances, not a return of the purchase price.
Separate fighter multipliers from max win
A 100× boxer value modifies a qualifying line win. It is not the same figure as the 7,500× advertised ceiling or the $250,000 cash maximum.
Gloves, robe, shorts and speed bag lead the paying ranks, then A–J card icons. A regular Wild substitutes; the Expanding Multiplier Wild covers a reel on a winning line and rolls 2×–100×. The championship-belt Scatter starts five Free Spins.
Top ordinary paying symbol. Three on a fixed line pay 5.00 FUN at the attached 1.00 FUN stake preview.
High thematic paying symbol. Three on a line pay 3.00 FUN on the attached stake preview.
Mid thematic paying symbol. Three on a line pay 2.00 FUN on the attached stake preview.
Lower thematic paying symbol. Three on a line pay 1.00 FUN on the attached stake preview.
Highest card-rank low. Three on a fixed line pay 0.80 FUN on the attached 1.00 FUN preview.
Card-rank low. Three on a line pay 0.70 FUN on the attached stake preview.
Card-rank low. Three on a line pay 0.60 FUN on the attached stake preview.
Lowest card-rank icon. Three on a line pay 0.50 FUN on the attached stake preview.
Riddec Games lists Ultimate KO at 95.14% RTP with Dynamic RTP support and very high volatility. This card stores 95.14% as the displayed RTP and both ends of the published span. Confirm the active return on the loaded information panel when an operator uses a Dynamic RTP build. Do not infer a separate Lucky Bet or Buy Bonus return from the headline figure alone. RTP remains a long-run setting for a stated mathematical configuration, not a short-session forecast or a conversion from the 7,500× ceiling.
Riddec Games
Very High
7,500×
Very high volatility and a five-line board allow long gaps between qualifying Expanding Wild wins. A costly Lucky Bet streak can still miss a paying line.
On a phone, open Bonus Buy and Lucky Bet and read each charge against the base bet before activating. Confirm whether you are buying Free Spins or only a Wild-guaranteed spin.
The studio prints 95.14% and supports Dynamic RTP. Confirm the figure on the loaded information panel before real-money play if a lobby shows another build.
Desktop frames show the splash, base 3×3 grid, Buy Free Spins confirm, ordinary paytable and Wild/Scatter help from the attached set.
Portrait frames keep the splash, base grid, Bonus Buy confirm, Expanding Wild help and five-line map from the attached mobile set.
Grid: three reels, three rows, five fixed lines
Expanding Wild: reel cover and 2×–100× multipliers
Free Spins: three Scatters for five rounds
RTP: confirm the listed 95.14% on the live panel
Primal Fury, also from Riddec Games, uses a 3×3, five-line layout with the same listed 95.14% RTP and an Expanding Wild that presents two random multipliers. Ultimate KO swaps the prehistoric theme and Fury Spins label for boxing Free Spins. Shared studio figures do not prove identical purchase-mode returns.
| Game | Return / max win | Volatility | Bonus fit | Watch out for |
|---|---|---|---|---|
| Ultimate KO | 95.14% / 7,500× | Very High | Three Scatters or a 60× Buy Bonus open five Free Spins with a guaranteed Expanding Multiplier Wild each round; Lucky Bet instead charges 10× per spin for a Wild appearance only. | Purchase and Lucky Bet costs are quoted in base-bet multiples. A 100× fighter multiplier after a 60× buy is not 100 times the purchase price. |
| Winter Trophy Hold and Win | 96.14% / 5,624× | Very High | Six non-resetting respins, Collect, +1 Spin, 5,000× jackpot, Free Spins with high symbols | Shared Hold and Win branding does not copy this card’s respin rule, RTP or 5,624× ceiling. |
| Big Bass Return to the Races | 94.07%–96.07% / 5,000× | High | Collector Wilds, 12-card pick, Golden Cup round, Ante Bet, 100× / 270× buys | Shared Big Bass branding does not copy this card’s RTP or 5,000× ceiling. |
When comparing, ask whether the Expanding Wild needs a paying line before the boxing multiplier applies, and whether Lucky Bet starts Free Spins.
Treat neighbouring Riddec titles as a shortlist, not as proof. Shared 3×3 branding does not copy Free Spins length, Lucky Bet pricing or max-win cash caps.
Sari-Sari Shop
Primal Fury
Hamsterpunk Halloween
Publication status: Document-based review against the Riddec Games game listing, attached help frames and demo; no cash session is represented.
Studio listing. Matched 3×3 layout, five lines, 95.14% RTP, Dynamic RTP support, very high volatility, 7,500× maximum, $250,000 cash cap, Expanding Wild multiplier list, Free Spins, Lucky Bet and Buy Bonus to the Riddec Games Ultimate KO page.
Help frames. Checked ordinary paytable cells at a 1.00 FUN stake preview, Wild and Scatter rules, Expanding Wild expansion copy and the five fixed payline map on the attached screenshots.
Preview figures. Paytable FUN cells on screenshots are labelled as preview figures for the loaded demo stake beside the published 95.14% RTP.
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Riddec Games dates the release to 27 August 2026.
No. Every Free Spin includes an Expanding Multiplier Wild appearance, but expansion and the multiplier apply only as part of a qualifying winning combination.
No. Two potential multipliers are revealed, and the applicable value is selected randomly.
No. Lucky Bet charges 10× the base stake per spin for a Wild appearance. Buy Bonus charges 60× once for direct entry into five Free Spins.
Riddec Games lists 95.14% with Dynamic RTP support. This card stores 95.14% as the displayed RTP and both ends of the published span.
The studio lists a maximum multiplier of 7,500× total bet, separate from the $250,000 cash maximum and from any single 100× fighter multiplier.
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