Gravity Bonanza Slot Review: 7×7 Cluster Pays and Black Holes

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🕒 Last updated: 27 July 2026

Gravity Bonanza is a 7×7 cluster-pays slot from Pragmatic Play, released in September 2023. Wins form when five or more matching symbols connect horizontally or vertically, then tumble away so replacements can drop in. The default RTP is 96.09% and the win cap is 10,000x the bet.

The space theme carries a real mechanic behind it. A Black Hole symbol lands, picks one random symbol type and drags every copy of it off the grid, feeding a counter that pays the Gravity Bonus. Pragmatic rates volatility high, 5 out of 5.

Where to play Gravity Bonanza online

How Gravity Bonanza works

There are no paylines. A cluster needs five or more matching symbols touching each other horizontally or vertically, and cluster size sets the payout: five connected symbols return 0.2x to 1x the bet depending on the symbol, while a cluster of 31 or more pays between 1,000x and 10,000x. Bets run from 0.20 to 240 in USD, EUR or GBP.

Winning clusters are removed and new symbols fall into the gaps, so a single paid spin can chain several wins before the grid settles. Gravity Bonanza has no wild symbol, which means every cluster must be built out of the paying symbols themselves. There is nothing on the reels to patch a near miss.

The Black Hole is the part that separates this game from the rest of the Bonanza-titled catalogue. Only one can land per spin sequence. When it appears it selects a random symbol type and collects every instance of it on screen, and the total number of symbols swallowed determines the Gravity Bonus prize. Landing 3 to 7 UFO scatters opens the free spins round, which awards from 10 up to 50 spins.

Gravity Bonanza bonus features

The Black Hole drives everything. It can appear during any spin sequence, but only once, and it ignores where symbols sit on the grid: it chooses a symbol type and removes every copy in view. Because the Gravity Bonus is priced off the count of symbols collected, the feature rewards a grid crowded with one symbol rather than a single tidy cluster. Tumbles keep running while new clusters keep forming, and the Black Hole can drop into that sequence.

Free spins are triggered by 3 to 7 UFO scatters and pay out between 10 and 50 spins depending on how many land. Inside the round the Black Hole can arrive carrying a multiplier of x2, x3, x5 or x10, and that multiplier is applied to the Gravity Bonus prize rather than to the tumble total. A large collection combined with a x10 is where the 10,000x ceiling lives.

A feature buy is available at 100x the stake, and Pragmatic publishes the trade-off openly: buying drops the top RTP from 96.09% to 95.99%. The buy is not offered in the United Kingdom, where bonus purchases are prohibited. Pragmatic has not published a base-game hit frequency for Gravity Bonanza, so there is no verified figure for how often a paid spin returns anything at all.

Gravity Bonanza RTP, volatility and max win

Gravity Bonanza ships with three RTP settings and the casino, not the player, decides which one is live: 96.09%, 95.07% or 94.00%. That is a spread of more than two percentage points between the best and worst configuration, a bigger difference than most players assume exists between one casino and another. The only reliable way to know which tier you are on is the in-game information screen. Open the paytable from the menu and read the RTP line stated there, because review sites almost always quote the maximum. If you buy the bonus at 100x, the top figure becomes 95.99%.

Volatility is high and Pragmatic’s own in-game meter reads 5 out of 5. The maximum win is 10,000x the bet, reached through the Gravity Bonus rather than through cluster payouts alone. Pragmatic has not published a max-win probability or a hit frequency for this title, so neither figure appears here. Treat the 10,000x number as a ceiling that exists in the maths, not as an outcome to plan around.

Gravity Bonanza pros and cons

Gravity Bonanza compared with other Bonanza slots

If the cluster format is the draw, Candy Bonanza from PG Soft runs the same idea on a 6×6 grid with a 96.72% RTP and a 50,000x ceiling, five times Gravity Bonanza’s cap. Bomb Bonanza is the opposite trade: a 5×5 grid with 50 fixed paylines, 96.46% RTP and a modest 2,015x maximum. Cash Bonanza (96.52%, 5,000x) and Aztec Bonanza (96.53%, 19,440x) both grow their grids as wins land, with Aztec rated a gentler 3.5 out of 5 on volatility.

Verdict

Gravity Bonanza earns its place through one idea executed properly. The Black Hole turns a standard 7×7 tumble game into something where the shape of the grid matters, and the free spins multipliers give the round a reason to exist beyond extra spins. The absence of a wild makes the base game genuinely dry between features, and at 5 out of 5 volatility that dryness is the point. Check which of the three RTP tiers your casino runs before you play, because the gap runs from 96.09% down to 94.00%.

Gravity Bonanza FAQ