Duel SixSixSix Slot Review - Hacksaw Gaming | 25,000x Max Win
Hacksaw Gaming summons infernal chaos with SixSixSix, a devilishly volatile slot where Hell's gates open to reveal expanding symbols, soul-collecting mechanics, and three progressively intense bonus modes. With extreme volatility and 25,000x maximum win potential, this dark masterpiece delivers sinful thrills for those brave enough to descend.
Key Features
Gameplay & Mechanics
SixSixSix plays on a 5-reel, 3-row grid with 243 ways to win, featuring extreme volatility (9/10) with 96.13% base RTP and bets from €0.20 to €100. Hacksaw sets the scene in a dark, hellish realm with burning gates, skulls, pentagrams, and demonic imagery throughout. Low-pay symbols are occult items—chalices, daggers, spell books, and candles (0.3-0.8x for 5OAK). High-pays feature demonic characters: succubi, hellhounds, and the Devil himself awards 15x for five matching. The Pentagram acts as the Wild, substituting all symbols except scatters and appearing on reels 2-4. The Soul Collector mechanic activates randomly in the base game: when triggered, a demonic counter appears and begins collecting soul values from special overlay symbols. These values (typically 1x-10x bet) accumulate in the collector, and when filled, award an instant cash prize before resetting. Occasionally, premium symbols land with red demonic auras—these are Hell Symbols that can expand to fill their entire reel when part of a winning combination, dramatically increasing hit frequency and win sizes. The base game maintains tension through these random features, though big wins remain elusive until bonus features trigger.
Bonus Features
SixSixSix offers three progressively intense free spins tiers. Purgatory Spins trigger with 3 scatters, awarding 6 free spins. During this feature, one random symbol is selected as the Hell Symbol and will expand to fill its reel whenever it appears, guaranteed. It's straightforward but effective—essentially free spins with a sticky expanding symbol. Landing 2+ scatters during the feature awards +3 spins per scatter. Inferno Spins trigger with 4 scatters, awarding 10 free spins. This feature includes the expanding Hell Symbol plus an active Soul Collector that persists throughout. Soul values appear more frequently on reels, and the collector accumulates multipliers that apply to your total win at feature end. Collected values can reach x50 or higher through the duration. Hell Spins trigger with 5 scatters, awarding 13 free spins—the ultimate chaos. This combines expanding Hell Symbols (now two different symbols can expand simultaneously) with an aggressive Soul Collector, plus all premium symbols have enhanced frequency. When multiple expanded reels align with collected multipliers, the mathematics can deliver enormous wins approaching 25,000x. The Bonus Gamble feature appears after any bonus trigger, allowing you to risk your feature on a spinning wheel for a chance to upgrade to the next tier (Purgatory → Inferno → Hell) or lose it entirely. Bonus Buy options include: Purgatory (60x stake), Inferno (250x stake), Hell (600x stake), and Mystery (350x stake for random tier selection with boosted odds for higher tiers).
Graphics & Sound
Hacksaw Gaming fully commits to the infernal theme with some of their darkest, most atmospheric visuals to date. The game takes place at the gates of Hell, featuring towering obsidian pillars, molten lava rivers, and a blood-red sky choked with ash and smoke. Pentagram symbols pulse with dark energy, and the Devil symbol features detailed artwork with glowing eyes and horned majesty. Soul Collector animations show spectral essences being drawn from symbols and absorbed into a demonic vortex. Expanding Hell Symbols ignite with flame effects as they grow to fill reels, leaving trails of hellfire. During Hell Spins, the entire screen shifts to deeper crimson tones with increased particle effects—embers drift, chains rattle, and the atmosphere becomes oppressively dark. Character symbols are exceptionally detailed: the succubus has realistic shading and movement, hellhounds bare fangs with dripping saliva, and the Devil radiates malevolent power. The soundtrack is appropriately ominous with heavy orchestral strings, Gregorian chant-like vocals, and industrial percussion. During bonus features, the music intensifies with demonic choir vocals and thunderous drums. Big wins trigger triumphant yet sinister fanfares with organ pipes and hellish laughter. Sound design includes constant atmospheric elements—distant screams, crackling flames, rattling chains, and demonic whispers that create genuine unease. Performance is excellent despite heavy visual effects, maintaining smooth animations even during maximum chaos with multiple expanding symbols and soul collections. Mobile optimization preserves the dark atmosphere on smaller screens.
Final Verdict
SixSixSix stands as one of Hacksaw Gaming's most thematically committed and mechanically intense releases. The three-tier bonus system creates clear progression and strategic decisions through the gamble feature—do you take safe Purgatory spins or risk it for Hell's maximum potential? The expanding symbols combined with soul collector multipliers create explosive potential, especially during Hell Spins where multiple mechanics converge. With a net RTP of 98.13% on Duel Casino and 25,000x maximum win, the mathematics are aggressive but fair for extreme volatility enthusiasts. Base game action stays engaging through random soul collections and occasional expanding symbols, though patience is required—this is extreme volatility where dry spells can be brutal. The infernal theme isn't just cosmetic; it perfectly matches the high-risk, potentially damning nature of the gameplay. You're genuinely gambling with the Devil here, and the atmosphere reinforces that contract. When Hell Spins align with maximum soul collector multipliers and dual expanding premiums across all reels, few slots deliver comparable intensity and win potential. This isn't for everyone—players seeking relaxed gameplay should look elsewhere—but for those who appreciate dark themes, extreme variance, and the genuine possibility of massive wins, SixSixSix is a devilishly excellent choice. The production quality, mechanical depth, and sheer atmospheric commitment make this one of Hacksaw's strongest releases. Highly recommended for experienced high-volatility players who can handle the heat and aren't afraid to descend into Hell for a shot at 25,000x redemption.
Last updated: November 27, 2024
Try SixSixSix on Duel CasinoFrequently Asked Questions
What is the RTP of SixSixSix on Duel Casino?
SixSixSix offers a net RTP of 98.13% on Duel Casino, compared to the base RTP of 96.13%. This enhanced RTP provides better long-term value for this extreme volatility slot.
How do the three bonus tiers differ in SixSixSix?
Purgatory (3 scatters, 6 spins) offers basic expanding symbols. Inferno (4 scatters, 10 spins) adds soul collector multipliers that accumulate. Hell (5 scatters, 13 spins) combines both features with enhanced frequencies and persistent expanding symbols for maximum chaos and win potential.
What is the maximum win in SixSixSix?
The maximum win is 25,000x your stake, achievable during Hell Spins when multiple expanding symbols combine with accumulated soul collector multipliers across all reels.



