Diamond Mine Megaways Slot – 96.43% RTP, Rules & Features

Quick answer

Diamond Mine Megaways is a Blueprint Gaming slot (2018) with 96.43% RTP and very high volatility. It uses up to 117,649 ways with multipliers, mystery symbols and free spins. RTP can vary by casino.

Key specs

RTP: 96.43%
Volatility: Very high
Grid: 6×7
Pays: Up to 117,649 ways
Released: 1 May 2018
Bet range: $0.20–$100
Jackpot: None

Not published by the provider: max win

Top-rated casinos (check the game is available)

We haven't confirmed which partner carries this game.

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Key terms
18+. New customers only. Min deposit $20. 30x bonus wagering requirement. Max bet $5 while wagering. Free spins on Book of Dead at $0.20 per spin. Spins credited in daily batches of 20 over 10 days. Offer valid 30 days. Full T&Cs apply. Please gamble responsibly.
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Key terms
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Key terms
18+. New customers only. Min deposit $50. 40x bonus wagering requirement. Max bet $10 while wagering. Cashback: 10% of net casino losses each week (Monday to Sunday), paid as cash with no wagering every Monday, up to $500 a week. Offer valid 60 days. Full T&Cs apply. Please gamble responsibly.

Game availability varies by casino and country.

What does an hour cost?

Themes:

Gems & goldWild West

Part of the Diamond Mine series.

Member access — full guide unlocked

How to play Diamond Mine Megaways (members only)

The number of symbols on each reel changes every spin, so the number of ways to win changes too. Matching symbols on adjacent reels, from left to right, pay in any position.

Diamond Mine Megaways is played on a 6×7 grid with up to 117,649 ways.

Set your stake. Choose your total bet per spin between $0.20 and $100. Wins are paid as multiples of this stake.
Check the paytable. Open the game's info screen to see what each symbol pays and the exact rules for this version.
Spin. Each spin's result is decided by a certified random number generator, independent of previous spins.
Trigger the bonus. Land the required scatter symbols to start the free spins feature.

The full Diamond Mine Megaways guide: how winnings work, 4 features and 4 strategy tips

Your stake plan: a $50 budget → about $0.12 a spin (very high volatility)
What 96.43% RTP costs per $100 wagered: $3.57 on average
4 features explained: multipliers, mystery symbols, megaways, free spins
Stake plans for $20 to $250 budgets, checked against the $0.20 minimum bet
3 RTP versions compared: 96.43%, 93%, 92.01%
4 slots with the same style and a higher RTP (up to 98.06%)
Strategy tips and a session planner for Diamond Mine Megaways

Free · no card · 18+ only

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How winnings work (members only)

What 96.43% RTP costs per $100 wagered

Multipliers are applied to wins as they land; in many games several multipliers add together or multiply each other, which is where the largest wins come from.

What 96.43% RTP means

Expected return = stake × 96.43%
Over $100 of total bets, the long-run average loss is $3.57

RTP is a long-run average across millions of spins. Any single session can finish far above or below it, especially on a very high volatility game.

Features explained (members only)

4 features explained: multipliers, mystery symbols, megaways, free spins

Multipliers

Multipliers increase a win by a set factor, such as 2x or 10x. They can be attached to symbols, applied to a whole spin, or grow during a feature, and are a main driver of the biggest wins.

Mystery symbols

Special symbols that all reveal the same randomly chosen regular symbol, which can complete several wins at once.

Megaways

A licensed mechanic where the number of symbols on each reel changes every spin, so the number of ways to win can run into the hundreds of thousands.

Free spins

A bonus round of spins played at no cost to your balance, usually triggered by landing three or more scatter symbols. Wins during the round are added to your balance, and many games let you retrigger extra spins.

Strategy tips (members only)

Size your stake to the volatility. Very high volatility means most spins lose and a large share of the return comes from rare big features. Treat it as entertainment with a strict budget and a stake of around 0.5% of your session budget or less. A simple rule: bring at least 400 spins' worth of budget, so a $50 budget suggests a stake of about $0.12.

3 more tips and a session planner

Check which RTP version you're playing. Blueprint Gaming offers this game at 96.43%, 93%, 92.01%. Open the game rules at your casino and prefer sites running the 96.43% version.
Bonus wagering: at 96.43% RTP, clearing $1,000 of wagering costs about $35.70 on average. Check the bonus terms, as some casinos exclude specific games. Run your numbers in the wagering calculator.
Set limits before you spin. Decide your loss limit and session time in advance and stop when you reach either. No pattern or betting system changes the outcome of a spin.

More on this in slot RTP and volatility explained and bankroll management.

Does it fit your budget? (members only)

Stake plans for $20 to $250 budgets, checked against the $0.20 minimum bet

For very high volatility we suggest a budget of at least 400 spins. This is what that means for Diamond Mine Megaways (bets from $0.20 up to a maximum bet of $100).

Stake plans for Diamond Mine Megaways
Budget	Stake a spin	Bet range	Average cost of 400 spins
$20	$0.05	Below the $0.20 minimum bet	$0.71
$50	$0.12	Below the $0.20 minimum bet	$1.78
$100	$0.25	Fits	$3.57
$250	$0.62	Fits	$8.92

Averages only: a short session can end far above or below them. Set a loss limit before you play.

RTP versions (members only)

3 RTP versions compared: 96.43%, 93%, 92.01%

Blueprint Gaming supplies Diamond Mine Megaways in 3 RTP versions and each casino chooses which one to run. Over $1,000 of bets, the 92.01% version costs about $44.20 more on average than the 96.43% version.

RTP versions of Diamond Mine Megaways
Version	Average cost per $100 wagered	Extra vs best
96.43% (best)	$3.57	—
93%	$7.00	+$3.43
92.01%	$7.99	+$4.42

Open the game's rules or info screen at your casino to see which version it runs.

Seen a different version at a casino? How member RTP reports work

Same style, better RTP (members only)

4 slots with the same style and a higher RTP (up to 98.06%)

Slots with the same mechanic (megaways) and volatility (very high) as Diamond Mine Megaways, with a higher published RTP. Casinos can still run lower versions of any of them.

Mystery Reels Megaways98.06% RTP · +1.63 pts

Well of Wilds Megaways97.71% RTP · +1.28 pts

Blood Suckers Megaways97.66% RTP · +1.23 pts

Book of Cats MEGAWAYS97.07% RTP · +0.64 pts

Questions

Frequently asked questions

Who makes Diamond Mine Megaways?

Diamond Mine Megaways is developed by Blueprint Gaming and was released in 2018.

What is the RTP of Diamond Mine Megaways?

The default RTP of Diamond Mine Megaways is 96.43%. Blueprint Gaming also supplies versions at 93%, 92.01%, so check the game's info screen at your casino.

Is Diamond Mine Megaways high volatility?

Diamond Mine Megaways is rated very high volatility. Very high volatility means most spins lose and a large share of the return comes from rare big features.

Can I play Diamond Mine Megaways for free?

Not on GambGenius at the moment: we don't list an official Blueprint Gaming demo of Diamond Mine Megaways.

Does Diamond Mine Megaways have a bonus buy?

No bonus buy is listed for Diamond Mine Megaways in the sources we checked.

Where this data comes from

blueprintgaming.com Provider
vegasslotsonline.com Slot database
slotslaunch.com Slot database

Specs come from the provider's own site and 2 independent slot databases. Casinos can run lower-RTP versions, so always check the game rules before you play.