BC.Game's Unique New Slot: Game Cave Of Plunder

1% House Edge Is The Lowest In The Slots Industry; That's 99% RTP (Return To Player)
bcgame slots cave of plunder


   First thing I want to point out here is the amazing 1% house edge. While 1% is fairly common on some other crypto casino games like Dice or Plinko, it is absolutely unheard of on any slots game. Regardless if it’s a physical cabinet slots game (one armed bandit), traditional online casino or a provably fair crypto casino. A typical slots game’s house edge can range anywhere from 5% – 20%. The lowest I could find after scouring the internet was 2.75% at some obscure, random site that I can’t even recall the name of. With a 99% RTP, and huge multipliers, this game gives you more than a fair chance to make some decent profits. Keep in mind that even with a 1% house edge, it’s still a house edge and will eat up your balance if you play too long.   

   Now for the fun stuff. Let’s take a closer look at the actual game itself. If you can manage to avoid the multiplier stealing skull and crossbones while climbing your way through the treasure filled Cave Of Plunder, you can collect a 500X jackpot. By the time you make it to the top, you will have most likely already collected several 7.5X and 21X jackpots along the way. Do you have the courage and willpower to climb to the top, or will you turn around and leave the cave with what you have collected before seeing the end? 


Game Play

   The  slot machine is totally unique. Especially, among the cryptocurrency casinos. The game shows the player three columns of multipliers that lead up to the  Small (7.5X), Medium (21.X) and Grand(500X) jackpots. Cave of Plunder is a one line slot which is very common. However, its uniqueness comes from its one reel design.  On this reel there are 5 possible symbols. Three of the symbols adds to one of the columns to its corresponding jackpot. One of the symbols removes an entire row of progress towards all three jackpots. One symbol is blank and does not add or remove any multipliers. There is a “partial collect” option which awards the player a payout from the highest multiplier they have achieved on each column. Then an entire row of multipliers is removed. Similar to the skull and crossbone effect except this feature pays an amount determined by the current progress into the player’s balance.


The Symbols (See chart for a complete list of the symbol’s multipliers)

 The Book adds to the column with the 7.5X Jackpot.     book slot symbol


 The Amulet adds to the column with the 21X Jackpot.  amulet slot symbol  



The Cross adds to the column with the 500X Jackpot.  


The Skull and Crossbones removes one entire row of    progress from all the columns mentioned above.    


 Gives Players A Choice 

   Cave of Plunder offers an experience similar to that of “Crash” or “Moon” type games in that the player actually has the choice to decide if they want to collect their winnings or keep going in hopes of a larger reward. Most every other slots game available gives players faux control of the outcomes by allowing them to perform actions like stopping the reels when they want or by selecting from a grid of possible bonuses. The truth about those is, the outcome is already decided the instant you press the “bet” button. What will you choose while making your way towards the top of the Cave of Plunder?


Towers, Jackpots And A Cashpot

   Each spin either adds, removes or does nothing to the “cashpot”. Every multiplier from each of the three columns adds to the single cashpot. The cashpot can be collected in full at any time or partially collected as explained above.  Each spin costs the player one wager. The wager amount can not be changed while there is an amount in the cashpot. 

   Collecting the cashpot is not the only way to be rewarded. Both the Book and the Amulet Jackpots are automatically awarded to the player’s balance upon reaching the top of their respective columns. These two jackpots can be collected an unlimited amount of times. Meaning, once the top of the column is reached, every time the Book or Amulet symbol appears on the real, that jackpot is again credited to the player’s balance until such time as a full cashpot collect is chosen or a Skull and Crossbones appears on the reel. 

   The Cross column jackpot is a bit different than the Book and Amulet Jackpots. At the top of the Cross column there is  a wheel with five possible multipliers. 100X, 200X, 300X, 400X, 500X. Once the top is reached the wheel spin is automatically triggered. After the Cross Jackpot is awarded, its column is reset back to the beginning. The Book and Amulet columns remain in their current positions even after the biggest Jackpot is awarded to the player’s balance.


The Symbols Multipliers

JackPot or Cashpot

Jackpot auto credited to balance



100X – 500X 

resets after collected



Added to cashpot10.5X205X45X
Added to cashpot5X137.5X28.5X
Added to cashpot


(bottom of column)

Added to cashpot 53X8X
Added to cashpot 28.5X


(bottom of column)

Added to cashpot 13X 
Added to cashpot 


(bottom of column)



Provably Fair

Q: How is the game result generated?

  A random number between 0 and 99,999 is generated using a provably fair algorithm. That process is described below.

  The random number (between 0 and 99,999) is then matched to the probability table and the corresponding symbol from the table is the game result.

Q: How is the random number generated?

  First, combine the server seed, client seed and the nonce to get the SHA512 hash.

  1. SHA-512 (combination) = server seed + client seed + nonce

    We use the combination to compute the SHA-512 hash. This gives us a 128-character hex string: hash = SHA-512 (combination)

  2. Then we take the first 5 characters of the 128 character hex string and convert them to a decimal number from 0 to 1,048,575 (16 ^ 5-1). If it is less than 1 million, it is used as the random number. If it is more than 1 million, we use the next five characters from the same 128 character hex string. We are able to repeat the process up to 25 times.
  3. In very rare cases ((48,576 / 1,000,000) ^ 25) When converting to decimal, none of the 25 trials are below 1 million, we use the remaining 3 characters and convert them to your random number

Code example:

  The following code example can be used to verify bets:

function get (serverSeed, clientSeed, nonce) {
  var hash = sha512 (serverSeed + clientSeed + nonce);
  var index = 0;
  do {
    var lucky = parseInt (hash.substr (index, 5), 16);
    index + = 5;
  } while (lucky> = 1000000);
    return lucky;

How to use the probability table?

  • Layer = How high you climbed each of the three columns and the effect it has on the probability range of each symbol.
  • Left = Book symbol
  • Middle = Cross symbol
  • Right = Gem symbol
  • Ghost = Skull symbol
  • Blank = No symbol

   Example: You currently have 2 layers of books, 1 layer of crosses, and 3 layers of potions. This means that the layer for reference on the next spin is layer 213. The random number you obtained from the SHA512 hash, converted to decimal, as described above, is 503140. The corresponding layer in your table is Layer 213. The range is Ghost [200800 + 122711 + 92033, 200800 + 122711 + 92033 +146113)

Action Spin:

   If the middle tower reaches the top level, the first 10 characters of the SHA-512 hash value are converted into decimal numbers and modulo 5 to get a random number of [0,4], which corresponds to 100-500 times the prize in turn.

Code example:

function get (serverSeed, clientSeed, nonce) {
  var hash = sha512 (serverSeed + clientSeed + nonce);
  var lucky = parseInt (hash.substr (0, 10), 16);
  return lucky%5;
Or you can just use the tool found at the BC.Game repository. The link is at the bottom of this review. 



   BC.Game’s Cave of Plunder offers an assortment of multipliers and gives players a real choice of whether to take the cashpot or keep climbing towards higher rewards. This exciting, edge of your seat, unique style of slots is exactly what to expect from BC.Game. Cave of Plunder is, of course, provably fair and the lucky algorithms are open source as always with BC.Game’s unique casino games. The probability table can be found here, BC.Game’s Cave of Plunder Github.