Underworld Inferno

Underworld Inferno is a 5-reel, 5-row hellish themed slot game with max wins of up to 25,000x your bet!

This online slot by GG Gaming features a rewarding random reel modifier, giving you massive bonuses when you land wins along its 15 paylines. Play now at Stake Casino!

How to Play Underworld Inferno & Gameplay

You don’t have to set your wager to the max bet to get a win. Simply land 3 or more matching symbols on one of the paylines on adjacent reels, starting from the leftmost reel. To test the game mechanics or bonus buy feature, play in demo mode at Stake.com.

There are thousands of online slot machines to play at Stake. For slot game beginners, we offer a guide on how to play video slots, and to explore more casino games, our online casinos guide can help you get started.

Theme & Graphics

The horror theme of this slot is amplified with skulls, fire, and a grid set in a dark lava cave. Our Stake Engine always produces interesting titles with popular slot themes, and while they’re Only on Stake, they’re always available as free slots.

Symbols & Paytable

Here are the slot symbol payouts for winning patterns based on a 1.00 bet amount:

Underworld Inferno Features & Bonus Games

Let’s dive into the bonus features you can expect.

Special Symbols

There are 3 special symbols - each with its own function:

• Skull Symbol: Acting as wild symbols, it can expand, adding multipliers of 2x, 3x, and 10x.

• Trigger Symbol: It transforms all highlighted tiles in the Coin Feature. Skull reels also need a Trigger symbol to retract.

• Bonus Symbol: Acting as a scatter symbol, this symbol is only available in the base game mode. Only one bonus symbol can land per reel.

Highlighted Positions

Each winning symbol will highlight its position. If a Skull symbol also lands, it expands and reveals a number of spots - up to 6x per position. If a Trigger symbol lands, all highlighted spots will reveal Coin and/or Collector symbols.

Coin Feature

This feature activates when a Trigger symbol lands while highlighted game tiles are on the board. Coin symbols act as instant prizes and come in 3 tiers:

• Bronze: 1x, 2x, 3x, 4x, 5x

• Silver: 10x, 20x, 25x, 50x

• Gold: 100x, 200x, 250x, 500x, 1000x

If there is a Collector symbol present, all Coin symbols and win multiplier values are applied. Collected Coin symbols then respin as bonus bet and reveal more Coin and/or Collector symbols.

Bonus Games

There are 2 bonus rounds you can trigger:

• Normal Bonus: 3 Bonus symbols trigger 10 free spins.

• Super Bonus: 4 Bonus symbols trigger 10 free spins with highlighted positions.

Highlighted multiplier bonuses remain on the reel layout until the bonus spins end.

Bonus Buy Option

Volatility varies depending on the buy feature you choose. Selecting a buy bonus triggers a feature instantly, letting you skip all base game spins. There are 5 bonus buy options:

• Bonus Boost - Costs 2x

• Special Spin 1 - Costs 30x

• Special Spin 2 - Costs 80x

• Normal Bonus - Costs 100x

• Super Bonus - Costs 300x

Bet Sizes, Max Win & Return to Player (RTP)

Underworld Inferno’s bets range from 0.10 to a 1000.00 maximum stake per round. Take note of the high volatility and 96.01% theoretical return-to-player percentage (RTP), as it will affect how often you land a win.

Although the house edge is 3.99%, the random number generator (RNG) will ensure that every spin outcome is fair. We suggest you keep your bet size low as you aim for the 25,000x max win.

How to Deposit, Withdraw Funds to Play Slots Online & Bet Responsibly

At Stake Casino, you can play Underworld Inferno using cryptocurrencies or a local currency. We suggest you use secure login methods, such as using a passkey when accessing your account.

Accepted local currency options include CAD, TRY, VND, ARS, CLP, MXN, USD in Ecuador, INR, PHP, GHS, and NGN, which we update on our community forum . Our local currency payment guide provides more details.

Playing Underworld Inferno using crypto is easy. Select your favourite from our list of available cryptocurrencies or read our guide on choosing the right coin for you. We accept coins like BTC, ETH, USDT, EOS, Doge, LTC, SOL, TRX, and more.

Swap Connect and Mesh are both seamless crypto payment systems you can access on our platform. For crypto exchanges, platforms such as Moonpay and Swapped.com are fast and reliable for buying your chosen crypto. Use Swap Crypto to exchange one crypto coin for another, directly in your wallet.

The Stake Vault is there to securely store your funds at Stake Casino, which you can learn more about in our crypto security guide.

We offer live support to players 24/7, and customer support staff can help with issues like depositing and withdrawing units, and more.

Responsible gambling should always be your priority when playing online casino games. We make it easy with our Stake Smart guidelines, offering tools like a monthly budget calculator and betting limit guide to help you stay in control.

Popular GG Gaming Slot Games on Stake

Here are more online slots from the same software provider you can try:

• Deadly Outlaw

• Zombie Rising

• Zeus of Olympus

At Stake, there are always new casino games you can try. There are slots with high and low volatility from top software providers, which are all available as demo slots. Be sure to check out our top casino bonuses and promotions - there’s something for everyone.

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Game Information