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Rules and Gameplay

Necronomicon, developed by ThunderSpin, is an intriguing slot game with a 5×3 format and 10 fixed paylines, ensuring players are engrossed in its dark, mythical theme inspired by H.P. Lovecraft’s universe. Players can adjust their bets using the user interface, with options to set the bet level and value to match their gaming preferences. The game includes features like auto play for continuous spins and max bet for high rollers aiming for the biggest wins. Its compatibility with various devices allows for a seamless gaming experience on desktops, laptops, mobiles, and tablets.

Bonus Features

Necronomicon boasts several captivating bonus features designed to enhance gameplay and increase winning chances:

  • Free Spins: Triggered by landing three or more Bonus symbols, awarding players with 15 free spins and a 2x multiplier on wins.
  • Cultist Symbols: These act as scatters during free spins, with every cultist trio gathered increasing the multiplier and granting additional free spins.
  • Claw Feature: Landing three different cultist symbols on a single reel summons Claw, a triple wild that stays on the reels for the duration of free spins, substituting any symbol to complete winning combinations.

These features, combined with the game’s high volatility, promise thrilling gameplay with the potential for substantial payouts.


The Necronomicon slot is adorned with a mix of eerie and mystical symbols:

  • Base Game Symbols: Includes odd, creepy creatures such as Thorn, Elder, Eater, and Eye Master, alongside traditional card symbols (J, Q, K, A).
  • Wild Symbol: A monstrous figure labeled ‘Wild’, which can substitute all symbols except for bonus symbols.
  • Bonus Symbol: Recognizable by the ‘bonus’ label, this symbol triggers the game’s special features.


Payouts in Necronomicon are designed to reward bravery in the face of the unknown, with the game offering the following payout structure:

Symbol 3 of a Kind 4 of a Kind 5 of a Kind
Eye Master x100 x500 x1200
Thorn x15 x50 x100
Card Symbols (J, Q, K, A) x3 x15 x50


Necronomicon is built on a foundation of 10 fixed paylines, offering players multiple opportunities to score winning combinations across the reels. This fixed structure means players need to adjust their bet sizes and values to optimize their strategy for these unchangeable paylines, focusing instead on maximizing their wins through the game’s features and bonuses.

Pros & Cons

Pros Cons
Eerie and engaging Lovecraftian theme RTP slightly below industry average
High-quality graphics and animations High volatility may not suit all players
Innovative bonus features with multipliers and free spins Limited availability across online casinos

Minimum and Maximum Bet

The betting range in Necronomicon caters to a wide variety of players, with the minimum bet set at a very accessible $0.10, making it an ideal choice for casual gamers. Conversely, the maximum bet can reach up to $100, appealing to high rollers looking for the thrill of large wagers. This range provides flexibility in betting strategies, accommodating both conservative gameplay and high-stakes gambling.

Game Jackpot

Necronomicon offers a top jackpot prize of x1000 the player’s stake, promising substantial payouts to those who dare to explore its dark depths. The game’s Return to Player (RTP) rate is 95.3%, slightly below the industry’s preferred standard but still offering fair chances for wins. Accompanied by high variance, this slot is designed for players seeking thrilling gameplay with the potential for significant but less frequent rewards, making every win a moment of excitement.

About Provider

ThunderSpin, the developer of Necronomicon, is a dynamic and innovative software provider focused on creating high-quality online slot games. As a subsidiary of Boss Gaming Studio and founded in 2015, ThunderSpin has quickly made its mark on the iGaming industry. With a commitment to excellence in gaming experience, ThunderSpin leverages top-notch graphics, engaging themes, and advanced technology to deliver compelling slot titles. Their portfolio showcases a dedication to creativity and player satisfaction, establishing ThunderSpin as a notable name in online casino gaming.

How To Play

  1. Start by adjusting your bet level and value according to your preference and bankroll. Use the +/- buttons to set these parameters.
  2. Check the paytable to understand the value of each symbol and the game’s bonus features.
  3. Use the spin button in the center to start the game. Alternatively, you can use auto play for a predetermined number of spins without interruption.
  4. Keep an eye on special symbols such as Wilds and Bonuses to trigger the game’s bonus features, including free spins and multipliers.
  5. Adjust your betting strategy as needed based on the outcome of your spins and the game’s volatility.


Necronomicon by ThunderSpin is a masterfully crafted slot game that successfully captures the eerie essence of H.P. Lovecraft’s universe. With its compelling blend of high-quality graphics, immersive soundtracks, and innovative gameplay features, it stands out in the crowded field of online slots. The game’s high volatility and RTP might pose a challenge for some, but it promises substantial rewards for those who embrace its dark themes. ThunderSpin demonstrates their prowess in game development with Necronomicon, offering an engaging and rewarding experience for daring players. Despite its few drawbacks, Necronomicon remains a must-try for fans of horror-themed slots and high-stakes gameplay.