Atomic Mushrooms

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Rules and Gameplay

Atomic Mushrooms slot game by Thunderspin offers an engaging gameplay experience set in a post-apocalyptic world dominated by sentient mushrooms. To play, you simply need to set your stake by selecting your payline bet, which is then multiplied by 10 to determine your total cost per spin. The game features fixed paylines, ensuring that all ten are active with every spin, allowing for a range of betting options from $0.10 up to $100 per spin. The game is initiated with the Spin button, and there’s also an Autoplay option for up to 500 automatic spins, providing flexibility for different playing styles.

Bonus Features

The Atomic Mushrooms slot game is enriched with unique and exciting bonus features that enhance the gaming experience. Key features include:

  • Wild Symbol: Represented by a brown mushroom with a red hat, it substitutes for all other symbols to form winning combinations and acts like a Scatter symbol to trigger Free Spins.
  • Free Spins: Triggered by landing three or more Wild symbols, awarding up to 25 Free Spins. All wins during this round are doubled initially.
  • Multiplier Increases: Throughout the Free Spins round, an additional blue Atomic symbol can appear, adding two more free spins and increasing the multiplier by x1 for every four Atomic symbols collected.
  • Bonus Pick Game: Occurs when the Bonus symbol, a double-headed mushroom, appears on the central reel, offering a chance at instant cash payouts through a selection process.


The game’s symbols are creatively designed to fit the quirky theme, with each symbol offering different payout values. Key symbols include:

  • Card Symbols (J, Q, K, A): Lower-value symbols offering payouts from 3x to 50x your payline stake.
  • Colored Hat Mushrooms (Yellow, Blue, Green, Red): Higher-value symbols with the red hat mushroom offering the highest payout of up to 1000x your payline stake.


Symbol 3 Symbols 4 Symbols 5 Symbols
J 3x 5x 10x
Q 5x 10x 25x
K 10x 15x 35x
A 15x 20x 50x
Yellow Hat Mushroom 20x 30x 100x
Blue Hat Mushroom 25x 50x 200x
Green Hat Mushroom 50x 100x 400x
Red Hat Mushroom 100x 400x 1000x


Atomic Mushrooms features 10 fixed paylines, ensuring every spin has the potential to trigger wins across all lines. The game’s structure promotes a wide array of winning combinations, suitable for players with different budget levels. Paylines are evaluated from left to right, with payouts multiplied by the payline stake.

Pros & Cons

Pros Cons
Unique and engaging theme with post-apocalyptic mushrooms Slightly lower than average RTP at 95.6%
Low volatility for frequent wins Theme might not appeal to all players
Exciting bonus features including free spins and multipliers Limited popularity might make it harder to find in online casinos

Minimum and Maximum Bet

The betting range in Atomic Mushrooms is designed to accommodate both low-budget players and high rollers. With all ten paylines active in every spin, players can place a minimum bet of $0.10 per spin. The maximum bet is capped at $100 per spin, offering a wide range of betting options to suit various playing preferences and bankroll sizes.

Game Jackpot

While Atomic Mushrooms does not feature a progressive jackpot, it offers a maximum win of up to 1,000 times the player’s payline stake. The game’s RTP (Return to Player) stands at 95.6%, which is slightly lower than the industry average. However, its low volatility means players can expect more frequent, though smaller, wins throughout their gaming session. This balance between RTP and volatility makes Atomic Mushrooms an appealing choice for players looking for consistent gameplay experiences.

About Provider

Thunderspin is renowned for its innovative approach to slot game development, focusing on high-quality graphics, engaging gameplay, and unique themes. As an independent provider, Thunderspin aims to leave a significant mark on the gaming industry by delivering games that stand out for their creativity and immersive experiences. Their commitment to innovation is evident in Atomic Mushrooms showcasing their ability to blend fantastical themes with solid slot mechanics. Furthermore, Thunderspin ensures all its games meet international gambling commission standards for fair play, emphasizing their dedication to trustworthiness and player satisfaction.

How To Play

  • Start by loading the Atomic Mushrooms game on your chosen device.
  • Adjust your bet size by selecting your payline bet, which will be multiplied by 10 to determine your total bet per spin.
  • Review the game rules, paytable, and payline structure by clicking on the ‘I’ icon beneath the main game screen.
  • Press the Spin button to start the game. The reels will begin to spin, displaying a variety of symbols.
  • Use the Autoplay feature to set up to 500 automatic spins at your chosen bet level if you prefer not to spin manually.
  • Adjust game sounds or mute them completely using the speaker icon underneath the player controls.


Atomic Mushrooms from Thunderspin offers a refreshingly unique take on the slot game genre, blending a quirky theme with solid gameplay mechanics. The game stands out for its creative design, engaging bonus features, and the ability to cater to a wide range of players with its flexible betting options. Despite a slightly lower RTP, its low volatility and the prospect of frequent wins make it an attractive option. Thunderspin’s commitment to innovation and fair play is clearly reflected in this game, making it a must-try for those looking for something different in the slot game market.