SixSixSix slot: everything about the 666 mechanic

Before Pray for Three and Pray for Six, there was SixSixSix — the Hacksaw Gaming slot that started the studio's devilish line of wheel-driven games. If you have played either of the newer titles, this is the game that explains where their DNA came from.

This article is a full breakdown of SixSixSix: the meaning behind the 666 theme, how the Wicked Wheels actually work, the unusual Deal with the Devil gamble, and how it all compares to Pray for Six. As always, the numbers stay honest and the hype stays out.

What is SixSixSix?

SixSixSix is a devil-themed video slot released by Hacksaw Gaming in July 2024. It uses a 5-reel, 4-row grid with 14 fixed paylines — a deliberately simple layout that lets the feature mechanics take centre stage.

Visually it is classic Hacksaw: a stark black-and-white palette, a graffiti-covered wall of occult markings, and two cartoon demons — Balthazar and Beelzebub — flanking the reels with their tridents. The tone is more playful than genuinely scary, with occasional splashes of red that hit hardest during big moments. The default RTP is 96.15%, with operator-selectable lower builds at 94.19%, 92.17% and 88.27%.

The base game is intentionally quiet. Wins are formed by landing three or more matching symbols across the 14 paylines, but the real point of every spin is to trigger a Wicked Wheel.

The 666 theme — what the mechanic means

The "666 mechanic" people search for is really the game's identity rather than a single feature. The number 666 — the biblical "number of the beast" — runs through everything: the title, the graffiti, and most importantly the "6" symbol that drives the entire feature set.

In SixSixSix, the "6" is the key that unlocks the Wicked Wheels and, through them, the free-spins rounds. The more 6s you land at once, the deeper into the game's bonus structure you go. The whole design is built so that chasing sixes is the gameplay — hence the name.

In SixSixSix, you are not chasing symbols across paylines — you are chasing the number six onto the Wicked Wheels.

Wicked Wheels: the heart of the game

The Wicked Wheels replace traditional wilds and scatters and are the beating heart of SixSixSix. A wheel is activated by landing the corresponding "6" symbol on reels 1, 3 or 5 — only one per reel, so up to three wheels can be active at once. When multiple multiplier wheels are live, their values are collected left to right.

There are two types of wheel, and the difference matters:

• Blue Wicked Wheel — available in the base game. It can award adding multipliers of 5x to 100x, multiplying multipliers of x2 to x10, or trigger a free-spins round.
• Red Wicked Wheel — the bonus-round wheel. It pays bigger: adding multipliers up to 500x and multiplying multipliers up to x20, and it can land the outright Max Win prize.

That 16,666x max win can arrive in any game mode — either by stacking multipliers or by hitting the Max Win segment directly on a Red Wheel. Land several wheels on one spin and the multipliers compound fast.

The three free-spins rounds

SixSixSix has a three-tier free-spins structure, and which round you enter depends on how many "6" symbols land on Wicked Wheels in the base game. Each round awards 10 free spins.

1. Speak of the Devil — triggered by one "6" on a Wicked Wheel. 10 free spins with an increased chance of both Blue and Red Wheels.
2. Let Hell Break Loose! — triggered by two "6" symbols at once. 10 free spins with a higher rate of Red Wheels; Blue Wheels do not appear.
3. What the Hell — triggered by three "6" symbols. 10 free spins with a guaranteed Red Wicked Wheel on every spin. This is the round you want.

For players who prefer not to wait, SixSixSix offers bonus buys: Wicked FeatureSpins (10x the bet), Red Wicked FeatureSpins (50x), Speak of the Devil (100x) and Let Hell Break Loose! (250x). What the Hell, as the top round, cannot be bought directly — though the gamble feature can get you there. Bonus buys are restricted in some jurisdictions.

Deal with the Devil — the signature gamble

The feature that made SixSixSix stand out is Deal with the Devil. When you trigger Speak of the Devil or Let Hell Break Loose!, you are offered a gamble before the round begins.

Accept the deal and a wheel appears showing the values 5, 8, 12, 16, 20 and a "6" symbol. If the wheel lands on a number, that becomes your new free-spins count — replacing the original 10. If it lands on the "6", your round is upgraded to the next tier: Speak of the Devil becomes Let Hell Break Loose!, and Let Hell Break Loose! becomes What the Hell.

The clever, player-friendly part: a bonus round cannot be downgraded or lost entirely. The worst outcome is fewer spins than the standard 10 — you never walk away with nothing. That makes the gamble genuinely tempting rather than a trap, and it is the design idea Hacksaw carried forward into its later devil-themed slots.

SixSixSix gameplay video

To see the Wicked Wheels and a Deal with the Devil play out in real time, here is a full gameplay session from YouTube. Click the thumbnail to load the video.

SixSixSix vs Pray for Six

If you found this article through Pray for Six, the obvious question is how the original compares to the newer game. They share a clear lineage, but they are built differently.

Grid and structure

SixSixSix uses a compact 5×4 grid with 14 fixed paylines — a traditional layout. Pray for Six runs on a larger 6×5 grid with a scatter-pays system and cascading reels. SixSixSix feels more like a classic slot; Pray for Six feels more modern and busier.

The wheels

Both games are wheel-driven, and that is no coincidence — the Wailing Wheel in Pray for Six is a direct descendant of the Wicked Wheels here. The key difference is the Deal with the Devil gamble, which is unique to SixSixSix and gives it a layer of decision-making the newer game does not have.

Max win and volatility

Pray for Six reaches higher with a 20,000x ceiling against 16,666x for SixSixSix, and it sits at the more extreme end of the volatility scale. SixSixSix is still a high-variance game with a low hit rate of around 17%, but its simpler structure makes it slightly easier to follow.

Verdict: is SixSixSix still worth playing?

Two years on, SixSixSix holds up well. It is the simplest of Hacksaw's devil-themed slots, and that is its strength — the Wicked Wheels and the Deal with the Devil gamble give it just enough depth without overcomplicating things. The base game is quiet, so this is a slot for players who play for the features, not for steady spins.

If you enjoy Pray for Six, SixSixSix is essential context — it is the blueprint. And the Deal with the Devil mechanic is genuinely worth experiencing, since the newer games dropped it. Just remember it carries the same warning as the rest of the series: high volatility, real risk, and a casino that should be running the top 96.15% RTP build.

As always, try it in a free demo first. Treat any big win as a bonus, not a plan, and never chase the number of the beast with money you cannot afford to lose.