Castle Builder 2 Slot Review

Slot Rating 9/ 10

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Castle Builder 2 Slot Review

Slot Details

Castle Builder 2 is a July 2017 sequel to the original Castle Builder slot from Rabcat.

For those who are unfamiliar, Rabcat is a software developer that exclusively produces slot games for Microgaming casino sites.

Ultimately, this is a video slot experience that integrates a variety of features that you would expect to see in a video game.

Slot Data

Min bet:00.15$
Max bet:30.00$
Max win:N/A
Type:Video Slot
Release:July 2017
Free Spins:Yes
Bonus Features:Yes

Slot Design

In the Castle Builder 2 slot, the right half of the screen is devoted to the five reels and five rows of symbols that can be spun in the search for winnings.

Meanwhile, the left side of the screen has been set aside for building a castle.

At the start of the game, Castle Builder 2 asks that you choose from one of two avatars to use, with a third that can be unlocked later.

Once the game begins, it is possible to go on and discover 15 different games and build up to 75 unique castles.

These unlock one by one as you progress through the different zones, in our case we have unlocked two of the zones on the map.

The fundamentals of the game center upon spinning the reels to gain materials and experience, which can lead to construction of bigger and better castles, as ordered by the kings and nobility you can work for.

At Microgaming casinos, the aim of the game is to match three or more identical building materials on a payline.

Wood, bricks, granite, and iron ore are the core materials needed and they can also generate payouts.

The requirements for each stage are shown in the bottom left.

Once a stage is completed, this will raise the status of the building bar.

As a builder you progress as well, unlocking achievements and levels.

As you can see on the image, our builder is level 3, our castle is around 75% complete and we have 2/6 materials on the bottom left for the next upgrade.

Slot Features

  • Wild symbols: these are relatively standard and can fill in the empty gaps of base game symbols.

  • Free spins: aim to land three or more scatters in any position in order to gain free spins.

Landing 3 scatters awards 10 free spins, that will start once you click the purple Spin button and will go on automatically. During our test we managed to land this feature quite often, however we rarely got anything out of it.

  • The Royal Wedding: Once the building progress bar has been filled and the castle is done, this feature triggers, allowing you to marry the princess with one of the admirers.

Choosing one of the admirers will give you their corresponding prize. However these are not in the order displayed on the progress board previously, so just pick whatever you’d like and hope for the best.

We completed this feature 5 times and tried picking different admirers in terms of position (first, middle, last), but it was always the one with least amount of dollars.


Castle Builder 2 expands on the original release by including even more unlock-able elements.

Quite often, slot games fall short when it comes to giving you a reason to replay them.

However, this could not be further from the case with Castle Builder 2, which is filled with new challenges and different avenues to gathering winnings.

If you are looking for a simple just spin slot, this is not it.

There’s plenty of clicking and choosing involved in this game, as well as map selecting and so on, so for some players this might be the ideal game.


Mitko Atanasov

Mitko Atanasov is a highly respected expert in the online casino and slot review industry, boasting over 14 years of experience. He is dedicated to providing unbiased and accurate reviews, empowering players to make informed decisions. His vast knowledge and expertise make him a trusted source of information for both novice and experienced players.

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  • What’s the maximum I can win, while playing Castle Builder 2 online slot?


  • Is Castle Builder 2 online slot available in my country?

    Castle Builder 2 is an online slot available in our promoted Microgaming online casinos. To check the list of the available countries open up the casino review of your choice and scroll down to ‘Available Countries’. If you see your country in the list, the casino takes players from your country and this slot will be available to you. This slot is NOT available in the US through our promoted Microgaming online casinos.

  • What’s the volatility of Castle Builder 2 online slot?

    The volatility/variance of the Castle Builder 2 online slot is MEDIUM. What does that mean in terms of win frequency and win size? It means average in terms of hit win frequency and average in terms of win size, when that actually happens. The general rule is the less frequently a slot hits, the bigger the prize is.

  • What’s the RTP of Castle Builder 2 online slot?

    The RTP of the Castle Builder 2 online slot is 96.89%. What does that mean? That 3.11% of the total bets will be kept by the casino, while 96.89% of the bets on this online slot will be returned to the players as winnings.

  • Why is Castle Builder 2 online slot rated 9 out of 10?

    We have deducted 1 point from Castle Builder 2 slot score, as we are unaware of the maximum win in this game. Everything else is just superb from the RTP at 96.89%, to the unusual building and progressing style of this online slot. In many ways it’s more of an RPG game, than a slot, where your character progresses and unlocks zones on the map. If you are looking for an online slot where to just spin, this one is not it.

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Last Updated On: 07-31-2023

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