Features we found: bonus buy, multiplier, jackpot, expanding, hold and win
Every slot is scored on the same four criteria, using the game's published data: RTP (40%), maximum win potential (25%), bonus features described in our review (30%) and how recent the release is (5%). Our editors can adjust a score after playing the game. Missing data counts as neutral. The score reflects the game's numbers and features, not your chances of winning; slots are games of chance, so please play responsibly.
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3 Super Volcanoes Overview3 Super Volcanoes is a hold-and-win style slot from Evoplay, released on 28 August 2026. It starts on a compact 4x3 grid that can grow to 4x5, and it has one unusual rule: there are no regular wins in the main game. Everything is paid in the Bonus Game, powered by three volcano boosters called Extra, Multi and Grow. The RTP is 96.03%, the volatility is medium-high, bets run from 0.10 to 100 and the maximum win is 4,970x the bet. Slotcatalog lists the hit frequency at 2.5%, which makes sense for a game where nothing pays outside the bonus. Theme and GraphicsThree erupting volcanoes, fire, red-hot coins and gold set the scene against a dark blue background. Each booster is tied to a colour – green, red and blue – and the markers on the symbols show at a glance which volcano is about to come alive. Triggering the Bonus GameLanding 4 symbols of any type on the middle row triggers the Bonus Game. Any symbol can land with a green, red or blue marker, which activates the Extra, Multi or Grow booster. The boosters active at the start depend on the markers in the triggering spin, and further markers during the bonus can switch on the ones still inactive. The Volcano Boosters
The Bonus GameAll symbols on the screen when the bonus starts stay on the reels, as does everything that lands during it. The round begins with 3 spins (4 with Extra), and every new symbol resets the counter. It ends when the spins run out or every position is filled; then the values of all symbols are added together and paid. Symbols and Prizes
The two top prizes need a full grid: GRAND (500x) for all 12 positions on the 4x3 field, and ULTIMATE (2,000x) for all 20 positions on the expanded 4x5 field. Getting to GRAND and ULTIMATEThe two top prizes reward filling the grid. On the normal 4x3 field, all 12 positions need a symbol for the GRAND; with Grow active, all 20 positions of the 4x5 field are needed for the ULTIMATE. Extra helps by giving one more spin after every new symbol, Collectors gather everything already on the reels, and Multi can then multiply those collected values in their positions – so the best rounds tend to be the ones where all three volcanoes erupt. Why There Are No Line WinsBecause the main game pays nothing on its own, most spins end without a win, and the game’s value is concentrated in the Bonus Game. Sticky Bonus symbols worth 5x to 8x the bet are the only thing that carries over between base spins – they wait on the reels until the bonus starts, unless you change your bet. Bonus Buy
After buying, at least 4 marked symbols are guaranteed on the middle row. Sticky Bonus symbols already on the reels are not carried into a bought bonus. Who Should Play It3 Super Volcanoes is for players who want a pure bonus-hunting game: the main game exists only to trigger the feature. If you enjoy hold-and-win rounds with multipliers and jackpots, give the free demo a try first. Where to Play 3 Super VolcanoesYou can try this game on MrJones Online Casino. There’s a unique casino bonus offer of 300% up to £1200 for a limited time. 3 Super Volcanoes was listed in all six of our partner casino libraries when we checked on 6 October 2026. |