Double Rainbow

The RTP figure you need to focus on is 94.53% — that's the floor operators commonly deploy, and it's the number most players will encounter in practice. The headline RTP is 96.38%, but Hacksaw's licensing structure allows operators to dial it down to 94.53%, 92.45%, or even 88.38%. On a medium-volatility slot, an 88.38% RTP configuration would be punishing; even 94.53% sits meaningfully below the 96%+ benchmark that most serious players use as a baseline.

Volatility is rated 3 out of 5 on Hacksaw's own internal scale, which tracks with the medium classification. The 39% hit frequency is genuinely above average — for comparison, Hacksaw's Wanted Dead or a Wild runs closer to a 25-28% hit rate at higher volatility, meaning Double Rainbow lands winning clusters far more regularly. That doesn't mean the wins are large; many base-game hits are small cluster payouts that barely cover the bet, but the rhythm is less punishing than a high-variance release.

The 5,000x max win is worth contextualizing. Hacksaw's own catalog includes titles like Stick 'Em (up to 10,000x) and King Carrot (also 10,000x), making Double Rainbow's ceiling notably conservative for the studio. Players chasing life-changing single-session swings will find more ceiling elsewhere in the Hacksaw library. What Double Rainbow trades in raw ceiling it partially recovers in frequency — the multiplier system creates multiple smaller escalation events per session rather than one rare jackpot-style eruption.

Double Rainbow runs on a 6-reel, 7-row grid — 42 symbol positions in total — with cluster pays replacing traditional paylines. A win requires five or more matching symbols connected horizontally or vertically anywhere on the grid. Winning symbols are then removed and replaced through the avalanche mechanic, allowing chain reactions within a single spin if new clusters form after each drop.

The wild symbol substitutes for any pay symbol to complete or extend clusters, though it carries no standalone value. All seven candy symbols — each representing one color of the rainbow — pay identically: between 0.10x and 50x stake for clusters ranging from 5 to 15 or more symbols. The 15+ cluster threshold is where the larger payouts live; smaller clusters mostly serve to extend cascades and trigger cloud symbols.

Bet range spans $0.20 to $100 per spin. At the minimum stake, the session cost is low enough for extended demo-style exploration of the multiplier system. At maximum bet, the 5,000x cap translates to a $500,000 potential payout — significant in absolute terms, though the probability path to that outcome requires stacking multiple high-value multipliers simultaneously during the Full Rainbow feature.

The cloud multiplier mechanic is the mechanical core of Double Rainbow, and it operates with more specificity than a standard win multiplier. When a cloud symbol lands, it assigns a multiplier — drawn from the range of 2x, 3x, 4x, 5x, 10x, 15x, 25x, 50x, 100x, or 250x — to the reel it occupies. Critically, the multiplier is color-coded to match one of the seven candy symbols. It only activates when a winning cluster of that specific color forms on the boosted reel.

Regular cloud symbols grant +1 extra respin with the multiplier held in place. Double Rainbow cloud symbols — the higher-tier variant — grant +3 extra respins. If a reel already carries a multiplier and a new cloud lands on it, the values stack additively. Multiple clouds on different reels can therefore be active simultaneously, each tied to different colors, creating a scenario where a single cascade sequence triggers several color-matched multipliers at once.

This color-specificity is what makes the system interesting rather than straightforward. Landing a 100x cloud on reel three means nothing unless a cluster of the corresponding color passes through that reel. It introduces a targeting element — you're not just hoping for big multipliers, you're hoping for color alignment. That alignment failure is also the main source of frustration in longer sessions, where large multipliers sit idle because the matching color simply doesn't cluster.

The Full Rainbow Free Spins feature is the slot's peak event. It triggers when all seven reels have been activated with a color-specific multiplier — one for each of the seven candy colors. At that point, every existing multiplier on the grid receives a random boost of 2x, 3x, 4x, 5x, or 10x, and the player receives five additional free spins with all boosted multipliers locked in place. The compounding potential here is the clearest route to the upper end of the pay range.

For players who don't want to wait for organic trigger conditions, the bonus buy feature (unavailable to UK players) offers two entry points. The first costs 10x stake and guarantees at least one extra spin with three active reel multipliers starting at 4x each. The second costs 50x stake and delivers four guaranteed extra spins with the same three reel multipliers at 4x. Neither purchase guarantees the Full Rainbow event, but both provide a running start into the multiplier accumulation phase.

The additional free spins mechanic — separate from the Full Rainbow trigger — means extra spins can be earned incrementally through cloud symbol landings during the bonus phase, extending sessions when the multiplier alignment is building toward something meaningful. The interplay between respin grants and multiplier stacking is where Double Rainbow's session variance actually lives, regardless of what the medium-volatility label implies.

Double Rainbow has logged 27,000 tracked bets across our five crypto-casino sources in the last 30 days. The biggest confirmed hit in that window was 1,031x — a result that required meaningful multiplier stacking but fell well short of the 5,000x theoretical ceiling, which aligns with what medium-volatility math would predict over a sample this size. The slot is currently trending cool on Spindex, meaning recent bet volume and win rates are running below the 30-day average.

A cool trend on a 39% hit-frequency slot is worth interpreting carefully. High hit frequency means players are returning to the game regularly — the base game doesn't feel dead between features. A cool trend here reflects that the larger multiplier events haven't been clustering in the recent window, not that the slot is suddenly barren. The 1,031x top hit is a realistic benchmark for what a well-timed bonus buy or organic Full Rainbow trigger can produce in a typical session, rather than an outlier.

For players using Spindex data to time sessions, the cool trend on Double Rainbow suggests the slot is not in a hot cycle. That can cut both ways — some players prefer entering during a cool phase on the theory that variance will mean-revert, while others follow momentum and wait for a trend shift. The 27K bet sample is large enough to be directionally meaningful rather than noise.

Hacksaw Gaming was founded in 2018 and has built a catalog of over 75 video slots, with a reputation for mechanical innovation across both high-concept dark-themed releases and lighter, more accessible titles. Double Rainbow sits firmly in the latter category — the same product line as releases like Tasty Treats — rather than alongside the studio's higher-profile commercial titles.

The studio's RTP flexibility is a recurring consideration across their catalog. Hacksaw designs games with multiple RTP configurations baked in, and operators choose which version to deploy. This is not unique to Double Rainbow, but the spread here — from 96.38% down to 88.38% — is unusually wide. Players should verify which RTP version is active at their chosen casino before committing real money, as the difference between 96.38% and 88.38% represents a dramatic shift in long-run expected return. Most regulated markets will publish this in the game's information panel.

Within Hacksaw's own medium-volatility cluster pays output, Double Rainbow's 5,000x cap is on the conservative end. The color-coded multiplier mechanic is, however, a distinguishing design choice — it's more conditional and therefore more strategically textured than a flat win multiplier applied uniformly to all symbols.

Double Rainbow suits players who want a cluster pays slot with meaningful session structure — specifically, one where you can track multiplier accumulation across reels and feel the build toward the Full Rainbow trigger rather than waiting passively for a random feature drop. The 39% hit frequency means the base game stays active, which helps bankroll longevity at lower stakes.

Players optimizing for RTP should verify their casino's configured version before playing. At 96.38%, Double Rainbow is competitive. At 94.53%, it's below average. At 92.45% or lower, it's a poor value proposition regardless of the feature set. This single variable matters more than almost any other factor for long-run players.

High-volatility hunters chasing 10,000x+ outcomes will find more suitable options in Hacksaw's own catalog. Players who prefer the aesthetic and tone of darker or more neutral-themed slots may find the rainbow and unicorn presentation a friction point — that's a legitimate preference, not a trivial complaint, since session enjoyment affects decision-making. For everyone else who's comfortable with the theme and has confirmed a reasonable RTP configuration, Double Rainbow is a mechanically solid medium-volatility option with a distinctive feature engine.

Double Rainbow is a better slot than its theme suggests, and a slightly worse slot than its feature list implies. The color-coded reel multiplier system is a genuine innovation — conditional, stackable, and capable of producing the kind of escalating tension that makes bonus rounds worth watching. The Full Rainbow free spins trigger, when it arrives, delivers a satisfying payoff structure rather than a single chaotic swing.

The limitations are real. A 5,000x max win is modest for Hacksaw in 2022. The RTP variability means the version most players encounter — 94.53% — is a step below what the game deserves given its mechanical quality. The cool trend on Spindex and a 1,031x recent top hit suggest the slot is currently in a quieter phase, which is relevant context for anyone considering a session now.

The base game pacing can feel slow before the first cloud symbols start accumulating meaningful multipliers, particularly at lower bet levels where small cluster wins dominate. That patience requirement is the main friction point mechanically. But for players who've confirmed a reasonable RTP configuration and are comfortable with medium volatility, Double Rainbow earns its place as a competent, distinctive entry in Hacksaw's cluster pays catalog.