Gameplay and Visuals
Visually, this game is considerably basic, with the reels set to a background of cold silvery steel that is representative of a bank vault. The five-reel, three-row set-up offers 20 paylines and the game itself is based on the classic noughts and crosses game, although the ultimate aim of this game is to crack the code to the vault to reveal the riches inside.
Below the reels, there is everything you need to play the game, including your current stake per line, how many paylines are active, the total bet, the spin button, a display showing the value of any winning lines, and an auto spin button.
This is a medium variance slot game that offers a Return to Player ratio of 95.16%, and the most you can win is 500x your unit stake on the base game. The minimum bet with all 20 paylines activated is 20c, whilst the maximum stake is limited to $400 for all 20 paylines.
There are only six symbols used in this game, with the noughts and crosses being joined by 7’s, Bars and the Joker symbol that acts as the wild symbol in this game and will substitute all other symbols except for the scatter, which is represented by a vault door. The 500x top payout on the base game comes when you land five 7 symbols on a payline, so with the maximum bet of $400, you can expect a return of $200,000.
The free spins round in this game is slightly more difficult to activate than other online slot games, where you typically need to land three scatter symbols as a minimum to receive free spins, this game requires you to land all five! However, help is at hand, as the nought symbol in this game has a trick up its sleeve, namely, they often transform into the vault door scatter symbol, which will give you a better chance to land the five you need to gain some free spins.
The Big Bank Bonus game is where some serious money can be won, with another 500x jackpot up for grabs. When this game activates, you will be taken to another screen where you will be presented with 15 bank vault door symbols. These vaults contain precious stones with six sapphires, five rubies and four diamonds to be discovered. You keep selecting a vault door to reveal one of the three different jewels until you have selected three-of-a-kind, and then the game will calculate your winning amount. This bonus feature triggers at random, so you may get lucky early on or you may have to wait a little while for it to activate.