Bullion Bank (Northern Lights Gaming) – Slot Review

Bullion Bank by Northern Lights Gaming adopts a classic bank-vault theme, taking players into a high-security setting filled with gold, cash and valuable treasures. The visual design features imposing steel walls and a reinforced vault door, creating an industrial atmosphere that contrasts with the bright golden tones of the coins, bullion and other riches.

The symbols further reinforce the focus on wealth, featuring diamonds, credit cards, stacks of banknotes, safes and dice. Exploding Piggy symbols and Mystery Coins introduce a playful element, while the Money Pile, Banker’s Bar and Double Dollars Bonus continue the treasure-collecting concept. Overall, Bullion Bank combines a polished metallic aesthetic with familiar symbols of money and luxury, delivering an engaging casino experience centred around unlocking a vault full of rewards.

Bullion Bank features a 5-reel, 4-row layout with 20 fixed pay lines. The game has medium volatility, an RTP of 96.16% and a maximum win of 8,000x your bet. Wagers range from £0.20 to £15.

Bullion Bank Symbols & Pay Table

There are 16 symbols in total, comprising four low-paying card symbols (J, Q, K and A) and four premium symbols represented by Dice, Credit Cards, Stacks of Bills and Diamonds. The remaining symbols include Coins, Exploding Piggy, Multiplier, Mystery Coin, Collect, Wild, Scatter, Super Scatter and Key symbols. The highest-paying regular symbol is the Diamond, awarding 10x your bet for five matching symbols across a pay line. Wild symbols appear exclusively in the base game and substitute for regular symbols to help create winning combinations. They can also form their own winning pay lines.

Bullion Bank Features & Mechanics

Coin Features

Coin Symbols and the Money Pile

Coin symbols appear in the base game and reveal individual cash prizes when they land. Each Coin is collected into the Money Pile, with additional Coins increasing the pile. Coin values held in the Money Pile adjust to match the current bet.

Exploding Piggy Symbol

The Exploding Piggy symbol can land in the base game, spawning between two and four Coin symbols directly onto the Money Pile.

Multiplier Symbol

Multiplier symbols also appear in the base game and apply a multiplier of 2x, 3x, 5x, 10x or 100x to all visible Coin symbols. These multipliers do not apply to Mystery Coins.

Mystery Coin Symbol

Mystery Coins land in the base game and are collected into the Money Pile. Their cash values remain hidden until they are collected by the Collect symbol, at which point each reveals a random prize.

Collect Symbol

The Collect symbol lands exclusively on reel 5 during the base game. It gathers and awards the values of all visible Coin symbols, then empties the Money Pile and resets the feature.

The collection animation is purely visual and has no influence on the awarding of prizes or features.

Scatter Nudging Respin and Banker’s Bar

Scatter symbols appear exclusively in the base game, with their appearance changing once the Banker’s Bar has been filled.

Landing two Scatter symbols across the top three rows triggers the Scatter Nudging Respin. The reels containing Scatters are held and nudged down by one row, while the remaining reels respin. The feature continues until a Scatter reaches the bottom row. Each respin also adds a token to the Banker’s Bar.

Collecting 20 Scatter tokens fills the Banker’s Bar and unlocks the Double Dollars Extra Life. Once filled, the Banker’s Bar does not reset.

Double Dollars Bonus

Landing three, four or five Scatter symbols triggers the Double Dollars Bonus. The number of Scatters determines which rows are initially locked:

• 3 Scatters: Rows 1 and 2 are locked.
• 4 Scatters: Row 1 is locked.
• 5 Scatters: All rows are unlocked.

The feature begins with three respins. If the Double Dollars Extra Life has been unlocked through the Banker’s Bar, the starting respin count increases to four.

Each unoccupied position respins individually, with Bullion, Key and Blank positions being the only possible outcomes. Landing any symbol resets the respin counter. Every new Bullion symbol awards the current cash prize held in the Banker’s Vault, which increases in value after each award.

Key symbols unlock additional rows. Landing two Keys unlocks one locked row, while filling all currently unlocked positions with Bullion symbols unlocks all remaining rows. Once every row has been opened, landing a single Key unlocks and triggers one of four available Jackpots.

Filling every position with Bullion symbols awards the Grand Jackpot. The feature ends when all positions are filled with Bullion symbols or no respins remain.

Fever Boost

Fever Boost increases the chances of triggering both the Money Pile and Double Dollars Bonus. When activated, the available outcomes are limited to Scatters, Coins, Mystery Coins, Exploding Piggy, Multipliers, Collect symbols and Blank positions.

This feature is available in the base game, and any progress made towards the Money Pile is retained when playing in Fever Boost mode.

Charged Bet

The Charged Bet option introduces additional Scatter symbols to the reels, increasing the likelihood of triggering the Double Dollars Bonus. Activating it multiplies the current bet by 1.5x.

However, the Charged Bet does not affect payline wins or Coin symbol values and is unavailable above certain bet limits.

Buy Feature

The Buy Feature menu can be accessed by selecting the BUY BONUS option during the base game. Two purchase options are available: the Double Dollars Bonus and the Super Double Dollars Bonus. The latter provides the Double Dollars Bonus with five Scatter symbols.

Features are purchased at the displayed price and played using the current bet. Selecting the Close button returns you to the base game. Some settings and feature options may be unavailable at certain bet levels.

Conclusion

Bullion Bank by Northern Lights Gaming offers an engaging vault-themed experience, combining medium volatility with a collection of rewarding features. The Money Pile mechanic allows players to build up Coin values, while Exploding Piggy symbols and Multipliers add further opportunities to increase potential pay outs. The Double Dollars Bonus provides the main attraction, with respins, expanding access to locked positions, escalating vault prizes and four jackpots to unlock, including the Grand Jackpot. Fever Boost and Charged Bet options also provide additional ways to increase feature opportunities. Be sure to try out this game on launch and check out our exclusive casino offers.