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Play Atomic Mushrooms for Free

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ThunderSpin
3.5

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Atomic Mushrooms Slot Machine

We’re not sure if the topic of mutated fungus has ever been covered by an online slot machine before, or come to think of it, by anything else, but Atomic Mushrooms is a unique game that’s full of fun and comes complete with some equally unique bonus rounds.

The designers at ThunderSpin must have had a great time thinking up this weird and wonderful online casino slot, which is populated by post-apocalyptic fungi, along with slime-covered playing card symbols, all spinning down 5 reels which are crossed by 10 paylines. Along with wild substitutions, you can enjoy free spins, multipliers and an Explosive Mushroom mini-game that leads to even more rewards.

The subject matter might be very weird, but it’s all presented in a cartoon style, complete with dancing mushrooms to the sides of the reels and a strange purple background filled with butterflies and a star held up with string. It’s all very bizarre, but certainly fun and comes with a high return to players percentage, while independent testing companies can guarantee that it plays fair at all times.

Game Info

Provider
ThunderSpin
ThunderSpin
Autoplay
Bonus Buy
Bonus Rounds
Cascading Reels/Avalanche Feature
Cluster Pays
Expanding
Free Spins
Gamble
Jackpot Slots
Megaways
Mobile
Multiplier Symbols
Mystery
Scatter Symbols
Spreading
Stacked
Sticky
Number of Paylines
10
Layout
Min Bet
0.1
Max Bet
10
Release Date
1/30/2018
Last Update
2/28/2025
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Meeting the Magic Mushrooms

At least 3 of the same symbol will be needed across a payline, on adjacent reels from the left side to get a prize, and as all lines are active, the minimum stake is set at 0.10 per spin, although there’s the option to try it out through the free Atomic Mushrooms video slots games provided by casinos. The high limit stake of 100.00 should be enough for all but real high rollers, and payouts are multiplies of the coin value wagered per line.

Radioactive J, Q, K and A symbols, each glowing in different colours will make up the lower-value winning combinations, while higher payouts are claimed when the various mushrooms appear. Each of these comic characters is also in a different colour, with the yellow mushroom returning 20x, 30x or 100x the line stake when it’s on 3, 4, or 5 reels, the green worth up to 200x, while the blue mushroom pays 400x when it fills a payline and the best wins are from the red, which is worth 100x, 400x and 1,000x.

A crazed-looking white mushroom with a red top is the wild symbol, and if players need to fill a gap in a continuous line of symbols, the wild will be able to substitute for others when it’s in the right place, so they still get paid for a winning line. It isn’t worth anything on its own however, and can’t replace the bonus symbols. But if you see 3 or more wild symbols at once, there’s a free spins bonus round, where special features are in play.

Unique Free Spins Games

Any 3 wild symbols will launch 15 free spins, while 4 wilds appearing at once will trigger 20 extra games and the best scenario is for 5 or more to land, as this will see an extra 25 spins play out at no risk to your bankroll.

All winnings are doubled in value throughout this round, but it’s even better than that, as a special Atomic symbol can turn up at any time. This strange blue guy will add 2 extra spins each time he appears, and for every 4 Atomic symbols that you see, a further win multiplier is applied to any remaining free spins.

The maximum multiplier is 5x, and you can keep track of what’s currently applied thanks to a bomb that gets assembled as the multipliers add up. Once it’s completed, you also get an extra payout of 30x the triggering stake.

Explosive Mushroom Bonus Game

An orange two-headed mushroom looks like the stuff of nightmares, but when it stops on the middle reel, in the base game only, it will take you to a unique bonus round. The aim of this Explosive Mushroom feature is to pick mushrooms and grab some bonus coin payouts, before finding an atomic explosion that ends the round in a ball of fire.

Is There Mushroom to Improve This Game?

This is without doubt one of the strangest online casino slot machines that we’ve come across, with a darkly comic theme and lots of weird characters making an appearance. But it’s all done with a great sense of humour, that’s typical of the ThunderSpin slot machine range.

Even as the game loads up, you can tell it’s going to be fun, as you see a number of slugs, all wearing tall hats, watching a little mushroom cloud rising up. It doesn’t make any sense, and that’s part of the appeal in this game that’s aimed at punters with a certain type of humour.

We especially like the bonus features, as who wouldn’t be happy with up to 25 free games, where all winnings are doubled, or potentially boosted by up to 5 times over? It’s also a real money slot, which means it can be played across compatible Android or Apple-powered smartphones and tablet computers, as well as desktop PC’s, or laptops.

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