Underground Tuning

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Rules and Gameplay

Underground Tuning slot offers an immersive gaming experience with a traditional video slot layout featuring five reels and three rows. It incorporates 20 fixed paylines that are always active, providing ample opportunities for winning combinations. Players can adjust their bet by setting the coin value between $0.01 and $1, and the number of coins per line from 1 to 5, leading to a betting range of $0.20 to $100 per spin. This game is designed to cater to both high rollers and casual players alike. The autoplay feature allows for a seamless gaming experience, enabling players to select between 10 and 500 automatic spins.

Bonus Features

Underground Tuning is packed with exciting bonus features that significantly enhance the gameplay and winning potential:

  • Wild Symbols: Nitro tanks act as wilds, substituting for all other symbols except the free spin symbol, and can become expanding wilds during free spin rounds.
  • Free Spins: Triggered by landing three green-haired lady symbols, awarding 10 free spins. The feature uses the same bets and coin values as the triggering spin and includes Nitro Wilds for increased wins. Additional free spins can be retriggered during this mode.

These features not only add depth to the game but also present players with the chance to achieve larger wins through the expanding wilds and the potentially endless cycle of free spins.


The game features a variety of symbols that contribute to its thrilling racing theme:

  • Low-paying symbols: Queen (Q), King (K), and Ace (A)
  • High-paying symbols: Speaker, Exhaust, Wheel, Brake Disk, Gear Stick
  • Special Symbols: Nitro Tank Wilds, Green-Haired Lady Free Spin Symbol

The symbols are beautifully designed, with car parts and racing elements dominating the reels, promising not only visual delight but also substantial payouts for winning combinations.


Underground Tuning features 20 fixed paylines, ensuring that players have plenty of opportunities to land winning combinations across the reels. Each payline is permanently active, allowing for consistent and engaging gameplay. The fixed nature of these paylines simplifies the betting process, making it straightforward for players to manage their wagers and enjoy the excitement of the game.

Pros & Cons

Pros Cons
High RTP of 97.01% No progressive jackpot
Exciting bonus features including free spins and expanding wilds Limited advanced settings for autoplay
Wide betting range suitable for all types of players Volatility not specified

Minimum and Maximum Bet

The betting range in Underground Tuning is designed to accommodate both cautious players and high rollers, with the minimum bet set at $0.20 and the maximum bet reaching $100. This wide range ensures that the game can be enjoyed by players with various bankroll sizes, making it accessible and enjoyable for everyone.

Game Jackpot

The jackpot in Underground Tuning can reach up to 15,000 coins, presenting a substantial winning potential. The game’s Return To Player (RTP) is a commendable 97.01%, which is above the industry average, indicating that players have a good chance of winning. However, the game’s variance has not been officially rated, making it a surprise element that could affect gameplay excitement and winning patterns.

About Provider

Charismatic is the provider behind Underground Tuning, known for their innovative gameplay and stunning visuals. Established in 2019, Charismatic has quickly won the hearts of millions of players worldwide. Their commitment to creating engaging online games with high-quality graphics and unique themes has made them a notable name in the online gaming industry. Underground Tuning is a testament to Charismatic’s dedication to excellence and innovation in online slots.

How To Play

  • Start by setting your bet. Adjust the coin value between $0.01 and $1, and choose the number of coins per line from 1 to 5.
  • Review the paytable to understand the payouts for different symbols and paylines.
  • Click the spin button to start the game. The reels will spin and land on a random combination of symbols across the paylines.
  • Use the autoplay feature for a predetermined number of spins if you prefer. Select between 10 and 500 spins without manual intervention.
  • Watch for special symbols like the wild and free spin symbols to trigger bonus features for higher wins.
  • Adjust your betting strategy as you play, depending on the game’s performance and your bankroll.


Underground Tuning is a thrilling video slot from Charismatic that combines high-quality visuals, an engaging theme, and generous bonus features. With a high RTP and a wide betting range, it caters to a broad audience of online slot enthusiasts. The game’s exciting bonus features, including free spins and expanding wilds, enhance the gaming experience and increase the potential for big wins. While the lack of a progressive jackpot and unspecified volatility might be drawbacks for some players, the overall gameplay, and the potential for substantial payouts make Underground Tuning a slot worth trying.