User rating5 / 5

Secret Code slot

NetEnt developers decided to present their version of The Da Vinci Code clues. The RTP in Secret Code slot is 96.3%, and the maximum payout can reach 400,000 coins. On the top of this page, you can play the demo version of this slot for free without registration.

Personal review of Secret Code slot

Secret Code slot machine does not fit for completing the bonus requirements (wagering rating is 4.89 from 10). The frequency of getting any winning (hit) is 38,87%. About the volatility, it's more in the high-level with the rating of 6,95 out of 20. During the usual spins, the probability of hitting any winning is 38.87%. Any bonus feature is triggering every 47th spin (2,11%).

Review and recommendations of the testing team

Secret Code slot
The Secret Code online slot is popular among the players, and it deserves attention and is quite impressive. Despite the standard and probably outdated graphics and sound for this provider, its gameplay gives quite a good potential for huge wins.

  • In the main game, the slot often gives out winning combinations, but with minimal wins. The expanding wild symbols which the slot often gives out help for this. During testing, with two wild symbols, it was possible to get a combination of the top symbols, with a win of more than 600x of total bets.
  • The slot gives out the bonus features with an interval of 30-80 spins. The winning it gives is not big and amounts to 20x - 50x total bets, but at the same time, the slot provides an opportunity to double the winnings, both fully and partially, and if you take a risk, you can get a big win from a small one.
  • Considering the winnings in the main game, as well as the frequent triggering of bonus features, we can say that this slot keeps the balance quite well and there is an opportunity to get expensive combinations with a win of more than 300x - 500x total bets.
  • The slot rarely gives out free spins. Their potential to give a massive win is huge due to the possible multiplayer up to x20, although the average value is usually about x5. It is quite difficult to tell the average value of the winnings, since the slot gives out winnings of about 30x total bets and 300x - 400x total bets, while it can also give winnings of several thousand bets.
  • We would not recommend this slot for games with bonus money because it is quite bad at keeping the balance. The slot is also suitable for games with real money.

The Netent declares the probabilities

  • The total percentage of the return in the slot is 96.3%. The fund is distributed as follows: 66% during usual spins, 13% in free spins mode and 17.3% in the bonuses.
  • The probability of triggering the bonus feature is 1%.
  • The probability of activating free spins is 0.7%. The probability of retriggering is 9.2%.
  • The maximum winning is 400,000 coins.

Hidden parameters and settings of Secret Code slot (data from testing)

  • The frequency of falling of the bonus is statistically every 47th spins (2,11%).
  • The probability of a hit (any winning) is 38,87%.
  • Distribution of the winnings is 73% in the main game and 27% in the bonus feature.
  • The maximum payout during the tests was 225x.
  • The average winning from the bonus was 23x.
  • Volatility is 6,95 out of 20 (high).
  • Cycle length is long.
  • The rating of the slot machine for the wagering is 4,89 out of 10.
  • RTP of 96.3% allows getting a positive mathematical expectation of winning at the casino.

Description of the slot machine

When fully loaded, you do not even have to press a button to understand that you are in one of the halls of a medieval castle. The playing field is decorated with arches, and the top of the screen is separated by slender columns of the ruler of the reels. As a basic colour, developers selected good brown tones, and the faint image in the background gives the slot machine a more elegant style.


All NetEnt slots have a set of specifications and getting familiar with it will help gamers during the game. Let's see what is there in a store for us in the Secret Code slot:

  • Number of reels - 5
  • The number of pay-lines - 20
  • The value of a coin - from 0.01 to 0.50
  • The number of coins per line - 5
  • The expected payout percentage - 96.3%
  • The maximum payout for one rotation - 400000 coins
  • Wild symbol - yes (Priest)
  • The most profitable symbol — x4000 (Professor)
  • Scatter - yes (Antique coat of Arms)
  • Free spins - yes (series of free spins from 3 and more Scatters with the additional multiplier up to x20)
  • Bonus game - yes (3-5 Bonus symbols start the game at the choice of objects)

Bonus feature

There are a bonus game and free spins that you trigger when you catch three scatter symbols, executed in the form of a circle. During free spins, your winning can be multiplied up to x20. In the bonus round, you will meet five statues holding old chests and faces hidden behind masks. Having five keys and obtaining success, you can safely begin to unlock the chests. The opening of each of the covers will be accompanied by masks falling. The game ends when you find a demon behind the mask. You can leave the bonus game at any time, without waiting for other chests. 

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Written by Vladislav Dibrov
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