Last Updated: Friday, 09 April 2021 09:03

Castle Builder slot

Castle Builder video slot
Everybody is dreaming about being a prince and a princess and trying their lifestyle. And we present to your attention a new slot about it. There you can travel around the world, build castles in different kingdoms and with each spin and you will become a beautiful prince or princess, where each has his castle. Castle Builder slot from Rabcat (Microgaming) is a unique beast, in which you are being waited for three different cards and an exciting storyline that allows you to survive all the adventures along with the main characters of the game. Your purpose will be to perform various tasks, build castles and then fight in a friendly match with the princesses or princes of each of the kingdoms, getting a massive prize for it. The developers have tried to do everything in such a way that you always have the interest to know what will happen next, and they have succeeded in everything.

At first, you should read below our detailed review of Castle Builder slot, and you will find out what other surprises you will be waited for during the gaming session. And we recommend that firstly, you have to test this game in demonstration mode, without registration and any messages.

Personal testers opinion about Castle Builder slot

The pay combinations are often found at Castle Builder machine. After all, the probability of dropping out of a hit is equal to 68.83%. But the bonus can be triggered, following the statistic in every 62nd spin (1,62%). 16% of the total prize fund will be transferred to them. The low volatility and short length of the cycle will help to keep balance if you choose the optimal bet option. By the way, this slot machine is recommended for fulfilling the wagering requirements - 5.5 out of 10.

Hidden parameters and settings of Castle Builder slot (data from the testing team)

  • The frequency of triggering the bonus is statistically, every 62nd spin (1,62%).
  • The probability of a hit (any winning) is 68,83%.
  • The distribution of the winnings is 84% in the usual spins and 16% in the bonus feature.
  • The maximum payout during the tests was 70x.
  • The average winning from the bonus was 23x.
  • Volatility is 5,63 out of 20 (from low to average).
  • Cycle length is from short to average.
  • The rating of the slot machine for the wagering is 5.5 out of 10.
  • RTP of 96.47% allows getting a positive mathematical expectation at the casino.

Description of the slot machine

If you launch the game once, you will immediately be surprised that the playing field has a somewhat unusual appearance, and it consists of two parts. On the right, there will be reels, and on the left, you will build your castles during the whole game. And all this interesting action takes place on 5 reels and 15 active pay lines, which you can change if you wish. But we do not recommend doing this, as it can reduce your winning potential.

The game does not have a wide range of bets. The nominal value of the coin varies from 0.01 to 1.0. The minimum bet size for one spin is equal to $ 0.01 (for one active line) and $ 0.15 for all active lines. The maximum amount is $ 15 which you can take. However, these figures may differ in different online casinos, so we advise them to specify in one place.

You should not haste to get upset because of the lack of free spins and bonus functions. Instead of them, developers offer to fulfil. During the game session, you have to collect building tools and materials to fulfil the king's order. And the sooner you do this, and the more rewards will be from his treasury. We liked that the base round and the bonus game are not divided but go hand in hand.

In conclusion, you are being waited for 3 kingdoms with 10 castles in each at the slot. After that, you go to the empire to build 5 more castles. After the whole cycle, the game begins anew. For each success, you are awarded medals and rewards. After playing enough time, we concluded that it is not right to consider this online slot so innovative.

Castle Builder slot machine has a colourful design and an exciting plot. The dispersion is extremely low, and the percentage of the payout is equal to 96.47%. To complete the full cycle, you do not need to have an impressive amount on the account, but you should be careful when you choose the stake. You can learn how to win at the slot in another section. We could not identify the size of the maximum winning.


  • Number of reels - 5
  • Number of pay-lines - 15
  • Cost of one coin - from 0.01 to 1
  • The size range of rates is from 0.01 to 15
  • The maximum winnings are x20000
  • Wild symbol - yes
  •  RTP is equal to 96.47%

Symbols and payments

All symbols are exclusively thematic at this game. What is surprising, but even traditional card images are created very original. They are depicted as the prince, the princess, the king, and the queen. Moreover, you will find bags of gold, chests that are filled with treasures, castle gates, building materials and tools, and also the image of the architect.

  • The royal family will give you from your treasury from 2 to 100 gold coins.
  • Bag of gold and two chests with treasures will bring you in a case of success, 10 to 1000 royal coins.
  • The most generous symbol is the Gate of the Castle. It pays 200, 2,000 or 20,000 coins.
  • Wild symbol: the architect is not only a wild symbol replacing any other image except the Building symbols, but it is also very generous. For the combination of five of his symbols, you are entitled to the winning of 20,000 coins.
  • Building symbols: it represents a set of building symbols during the falling out of which there is the erection of the castle. There are four types (standard, bronze, silver and gold) in the game. The more expensive the item, the more the line of the castle fills at one time and the more you will have the winning at the end of the game.

Bonus games and functions

As we have already mentioned above, the only, but very profitable chip of this slot is the thematic bonus game, which takes place throughout the entire game session.

Build Castles: you will advance during the game if you build castles. In the first three kingdoms, you build progressively more difficult castles and potentially win better with the help of the mouse click function at the very end of each building order. Each time you can win using building symbols, you will collect them on a special scale which is located in the upper left corner. At each next level, you will need to get more of these images. Moreover, to put them in a piggy bank, they should participate in the formation of the pay line:

  • Lock 1 = collect 10 symbols
  • Lock 2 = collect 11 symbols
  • Lock 3 = collect 12 symbols
  • Lock 4 = collect 13 symbols
  • Lock 5 = collect 14 symbols
  • Lock 6 = collect 15 symbols
  • Lock 7 = collect 16 symbols
  • Lock 8 = collect 17 symbols
  • Lock 9 = Collect 18 symbols
  • Lock 10 = collect 20 symbols
  • Empire Locks (5 locks) = collect 30 symbols

Every time you get winning and collect symbols, you fill three banks. If you get 5 winnings in symbols, you will get more money than 2 winnings.

Click Me Royal Wedding: Now we will consider three cash banks. Once the castle is finished, you will be able to choose one of the three brides to marry the owner of the castle. Behind each of them is hidden one of three accumulating banks which are located next to the dial of the set of building symbols. But when you make your choice, you do not know whether you get small, medium or big money. And not always the decision will be obvious since a beautiful prince or princess is far from guaranteeing a large payout.


Our developers created such a machine which is full of a great plot, beautiful graphics and special tasks. We suspect that some gamblers will appreciate the make-pretend storyline and the trick with the building of castles to go to the next level. But when the next level does not bring anything new again and again, and it becomes harder to get the click me function, soon you would like to ask why for a long time you were spinning the reels. Nevertheless, we do not dissuade you in any way, and we advise you to launch Castle Builder from Rabcat (Microgaming), at least in a test mode for virtual coins and who knows, maybe this game will become one of your favourite and luck will smile at your game process. So, it is your choice to play or not, but at first, you should make small or medium bets.

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Written by Vladislav Dibrov
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