Holy Diver

Provider

Big Time Gaming

Default RTP

96.54%

Volatility

High

Maximum win

23,306x

Core mechanic

Reel Adventure

What Holy Diver is

Holy Diver is the Big Time Gaming slot that introduced Reel Adventure — a mechanic that runs a second, separate game along the bottom of the screen while the reels spin above. It is built around the Dio track of the same name, and it is the most structurally ambitious game in the studio's catalogue.

Six reels using the Megaways engine, starting at up to 117,649 ways to win and reaching as high as 586,971 in the bonus. Published returns run 96.39% to 96.54%, volatility is high, and the maximum win is around 23,306x your stake.

Its genuinely unusual feature is that you choose your own volatility. Three progressive levels exist, and you decide whether to bank a bonus round now or push for a harsher, higher-paying version of it.

Reel Adventure explained

Below the reels, a knight walks along a path. He moves a short distance on every spin — reaching the next treasure chest typically takes one to five spins — and when he arrives at a chest he kicks it open to reveal a modifier that applies to reels two to five.

So there are two things happening simultaneously: the Megaways reels producing ordinary spins, and a slow-burning progression along the path that periodically injects a modifier. That progression is what makes the base game feel purposeful rather than a wait for a scatter — you can see how far the knight is from the next chest.

Critically, this game has no scatter symbol. The bonus round is reached by collecting gems from chests, not by landing a combination.

The four chest modifiers

Modifier	Effect
Standard Symbol Bonus	One low-value card symbol is selected; every instance on the middle reels turns wild
Sword Bonus	Up to three full reels turn into wild swords, each carrying a multiplier from 1x to 7x
Fireball Bonus	Up to four wilds are added, maximum one per reel, which can explode to turn adjacent positions wild
Gem Symbol Bonus	A gem is revealed and added to the shield beside the reels, progressing you toward the bonus

The Sword Bonus is the one to hope for. Three wild reels each carrying 7x combine multiplicatively for a theoretical 343x on a win crossing all three — the largest single multiplier available in the base game.

The level choice — the real decision

Gems revealed from chests are added to a shield on the left of the reels. Once four gems are collected, the game stops and offers you a choice:

• Take the free spins now at your current level, or
• Level up, discarding the immediate bonus to play on at a higher level with more ways to win and a bigger free spins multiplier.

There are three levels. Level one gives a 1x multiplier in free spins, level two gives 2x, level three gives 3x — and each level increases the ways count. Reach the top of level three and the free spins trigger automatically.

This is a genuine volatility dial rather than a cosmetic choice. Level one produces more frequent, smaller bonuses; level three produces fewer, considerably larger ones. Reviewers report the free spins tend to return at least around 30x stake at any level, so the level choice is about scaling that up, not about whether the round pays at all.

The practical rule: if your budget is running low, take the bonus. Levelling up means spending more base-game spins to reach a round you may not have the funds to arrive at. If you have plenty of budget, level three is where the game's maths is most interesting.

Free spins and the diamond collect

The bonus awards 10 free spins. During the round, every gem landing on reels two, three, four and five turns wild, carrying a multiplier equal to your level — so 1x, 2x or 3x.

The knight keeps working during the round, but his role changes: instead of opening chests he battles figures on the hilltop. Some fights he loses, which does nothing. When he wins, he leaves with a diamond.

• The first four diamonds each award one extra free spin.
• The fifth diamond retriggers the feature with a further eight free spins.

Every diamond and extra spin also increases the ways count, which is how the round climbs toward its maximum. And when the round ends, your level resets to one regardless of how high you had climbed.

How the ways count reaches 586,971

Standard Megaways caps at 117,649 — six reels of up to seven symbols each. Holy Diver exceeds that because the levels and the diamond collections add positions beyond the standard maximum, pushing the count toward roughly 586,789 to 586,971 ways depending on the source.

As on every Megaways game, this does not improve your odds. The paytable is scaled to the ways count, and individual six-of-a-kind wins pay only around 0.5x to 15x stake. What the larger grid genuinely does is increase how often wins land during the round, which matters because the wild multipliers are applied to those wins.

Why the RTP is a range, not a number

Published figures for this game run from 96.39% to 96.54%, and unusually that spread is not just operator configuration — the three levels have different volatilities and different returns. Playing at level three is not the same statistical proposition as playing at level one.

That makes the info screen more important than usual. Look for the return figure and check whether your build publishes per-level figures. Then, as always, confirm the operator has not deployed a reduced configuration on top of that.

The 23,306x ceiling

The maximum win is around 23,306x your stake, with the base game alone capable of roughly 17,042x — an unusually high base-game ceiling, driven by the 343x Sword Bonus combination.

Some sources quote 20,500x, so check your build. Either way it is among the largest ceilings in the studio's range, comparable to Star Clusters Megaclusters and above Extra Chilli.

Stakes on this game are modest — roughly $0.10 to $20 per spin — which caps the cash outcome accordingly.

Volatility you choose yourself

High volatility overall, but the level system means you are partly setting it. Level one is the most forgiving configuration in the game; level three is the harshest.

The base game is more active than most high-variance slots because the knight's progress and the chest modifiers give you events every few spins. That is genuinely good design — but be aware it also means the game rarely goes quiet, which removes the natural prompts to stop.

Stake sizing in practice

• Stakes run from about $0.10 to $20 per spin. Read the total bet field.
• Budget for at least 250 spins. Reaching four gems takes time, and levelling up takes considerably longer.
• Decide your level policy in advance. "I will take the bonus at level two" is a policy; deciding on the choice screen after a long build is not.
• If funds are low, take the bonus rather than levelling up. A level-three round you cannot afford to reach is worth nothing.
• Remember the level resets after every bonus — there is no permanent progress to protect.

Common misconceptions

The first is that levels persist. They do not — every completed bonus round returns you to level one, so a level-three round is a fresh climb each time.

The second is that levelling up is always correct. It raises the multiplier and the ways count, but it costs base-game spins, and a bankroll that runs out before the bonus arrives has bought nothing at all.

The third is that the Sword multipliers add. They multiply — three 7x wild reels give 343x, which is why that modifier is the one worth hoping for.

Who this suits

This suits a player who wants more to engage with than spinning reels, and who likes the idea of setting their own risk level. The Reel Adventure layer gives the base game a genuine second dimension, and the level choice is the closest thing to a real decision any slot on this site offers.

It suits less well anyone on a tight budget, since the gem collection and the level climb both consume base-game spins. And if you find a constantly active screen makes it hard to stop, this game's design works against you — set a spin count before you start.

FAQ

Where this fits in a session

Holy Diver is the most engaging base game in the Big Time Gaming range on this list, and that makes it a reasonable choice for a longer session rather than a short burst. The knight's progress gives you something to track on spins that would otherwise be dead, and the chest modifiers arrive frequently enough to keep the game moving.

A workable approach: play at level one or two for a session where you want to see several bonus rounds, and reserve the level-three climb for a session with budget to spare. Reviewers note the free spins tend to return something at any level, so taking the bonus early is rarely a wasted decision.

The caution is the flip side of good design: a base game that always has something happening is a base game that never signals a stopping point. Set a spin count before you start.