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Castle Builder Slot is currently available only in free play mode in your country.
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Castle Builder Slot Rabcat

Castle Builder is a highly interactive 15-payline video slot, set in 3 medieval kingdoms, which runs on the Rabcat software platform. The game’s symbols feature princesses, princes and kings, while the most important symbol in the game is the wild card in the form of an Architect. Players are welcome to try this entertaining slot here on this page for free or visit any of the Rabcat casinos to play the game for real money.

Before players start building their castle, they should regulate their wager. The “Bet” arrows are used to choose the coin value, ranging from 0.01 to 1. Clicking on the “Lines” arrows allows players to select the number of paylines played. The middle button is “Spin”, which initiates the game. Pressing “Max Bet” chooses the highest bet. Clicking on the “A” button prompts the reels to spin multiple times without interruption.

Castle construction is the main attraction of the game and, as players spin the reels, they acquire various building materi­al—­sta­ndard, bronze, silver and gold—which enables them to construct their castle. The more noble metal materials players collect, the higher the value of their castle.

Once the castle is completed, the king’s daughter moves in and chooses between 3 suitors. Each of the worshippers reveals his riches prior to the wedding. The future groom might be poor, which will result in a small win; he might possess average means, which leads to a medium sum; or he can prove to be rich, which secures a large winning amount.

Game Play

Bet: Choose the coin size.
Lines: Select the number of active paylines.
Spin: Start spinning the reels.
Max Bet: Select the highest wager.
A: Automatically play for a preset number of times.

Play game
Software Rabcat
Slot Type Video slots
RTP 96.47%
Special feature Wild
Slot details
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  • Software

  • Slot Type

  • Paylines

  • Reels

  • Min Coins Per Line

  • Max Coins Per Line

  • Min Coins Size

  • Max Coins Size

  • Jackpot

  • RTP

  • Bonus Game

  • Progressive

  • Wild Symbol

  • Scatter Symbol

  • Autoplay Option

  • Multiplier

  • Free Spins

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Castle Builder Slot Reviews by Players


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Afi4wins 2003 reviews
Reviewed on July 18, 2016


Role Playing Games, RPG in short, can be very addictive and enjoyable to play. RPG players have been playing the same game over many years, progressing from one level to the next higher level, from one version of the game to the next available version, and still waiting for the next future version to come out for continuation of their play. Castle Builder is actually such a Role Playing Game, whereby the main aim is to build and complete a castle, as commanded by each King of the region, for the future use of their daughters. Once the castle is completed, the daughter gets married to her chosen Prince, and so ends one chapter. Then you, the castle builder, moves on to the next mission, to build another castle for another daughter. And so the story goes. What is interesting here, is the fact that in building any castle, you need to play a game in order to win cash and building materials to sustain the building work. Without any of these, the castle cannot be completed, and so you become a failure! What? Me, a failure? Oh no...nosirree...not me...never me! By hook or by crook, I'll finish building that castle, and all the other castles too. Hehehe.

The role playing part is straightforward enough to understand, so no need to elaborate on that, but the game part, yes. All wins in the paytable are shown as the actual cash wins, so 5 of the Builder, the Wild symbol, pay 1333x the total bet, or $200 at $0.15 minimum bet size. The highest paying symbol, the Vault, also pays $200 for 5 of them, followed by all other symbols from $10.00 down to $0.10 for 5 of them. What? Just $0.10 for 5-of-a-kind? Yep, it is that blardy low! There aren't any Scatter symbols, Free Spins symbols, nor any Bonus symbols to look out for, not like in any other game, but just symbols of the King's family members, some of their items, and a building materials symbol. So, this Castle Builder game is definitely not the usual slot game that we know of, but a combination of role playing and slot playing, like it or not! Hehehe.

During the slot play, 2 or more building materials symbols appearing consecutively on any payline would build up the castle accordingly. 2 symbols is the Standard, 3 the Bronze, 4 the Silver, and 5 symbols the Gold, each one building up the castle according to its value, and contributing to the final Bonus Reward upon completion of the castle. The more Gold symbols won, the faster the castle build-up and the bigger the Bonus amount. Once the castle is done, 3 suitors would be presented and you pick one of them to be married off to the King's daughter. Each suitor has a hidden low, medium or high win award, but you won't know which is which until you pick one suitor out and see which award you have won. Most of the time, I had ended up with the low and medium win awards, but had also won the high win award a few times too. If you think that choosing the high win suitor would be easy, try playing the game, pick out the Prince, and see what award he would bring. Some of the high win suitors are simply downright ridiculous, but that's for tricking you into NOT picking on them, so you'll get the low and the medium win awards most of the time!

Frankly speaking, I wasn't bothered at all about the slot game itself, because there weren't any Free Spins or Bonus games to look out for, so I just let the game run on autoplay all the time, and watching as each castle gets built up instead. Hmm, watching those castles alone was interesting enough for me, because I've always been fascinated by them, but before I knew it, all my credits had went bust after building just a few castles! Sheesh...I would certainly need lots and lots of credits to complete this game till the end, but I wasn't about to become a failed builder, so I finally finished playing the entire game in the fun mode! I told you I'm never a failure, didn't I? Hahaha.


Playing Castle Builder was indeed fun for me. I enjoyed it, I enjoyed watching the castles get completed, I loved the beauty of each different castle, and that final Shangri-La Castle was simply built on islets in the clouds! A final totally impossible and improbable castle to build, but in a game, everything becomes possible! What I don't like about this Castle Builder game, is that I just cannot win on it, and probably can never win on it either! Simple as that! Hehehe.
Reviewed on May 20, 2016


Castle builder is indeed a strange kind of game. Quite unlike any other one that I have seen until now. By building castles you collect an ever increasing bonus (choice of 3). You KNOW you will receive one of the bonuses. The slot spins more often than not bring small prizes - and occasionally something larger.

It is a solid game where you can more or less calculate worst and best scenarios based on the size of the bonuses which you can see at all times. Sometimes the castle takes frustratingly long to build, and spins whittle away your cash despite wins - this being offset by the bonus which is waiting for you. Not a game to win a fortune on, but nice to play, very nice graphics and storyline - and good clean fun.


I played through the whole game and was slightly disappointed that after finished the last castle - the game just takes you right back to the beginning to "try again". No bonus round, just a minimal cash bonus.
zerooo 742 reviews
Reviewed on December 22, 2015


Castle Builder is 15 payline video slot game which I played only once. I do not like this game very much, because most of the time I had only small winnings.

The game is quite different than other video slots, this one offer building symbols which are most important elements in game. They come in standards, bronze, silver and gold. To progress the construction of a castle, you need to collect building elements on active payline from left to right.

When I played this game I never completed the castle. I don't know why, maybe because the base game was boring for me. I had only small winnings, and building elements never show up on the reels. I had bad feeling when I played it, most of the time I had small winnings, and by that I mean really small. I never got more than x20 bet size. I receiving only J, Q symbols. Sometimes a few combinations of wilds, but it paid poor to me.

I don't know maybe the game is more interesting after you complete the castle. But for me base game is not interesting and I do not like this game. The graphics are ok, but I will not play it more in the future.


The bad thing is that while I was playing it, I had only small winnings during base game. I never got any big win which could attractive me to play it more. The base game is quite boring for me, so as the payouts. I expected higher winnings when wild symbols are on the reels, not only some pennies.

The paytable should be set higher, most of time I received only x2 to x5 bet size back. And this is not interesting at all, this game just eats balance while you are trying to build the castle. I will rate it with 5 stars, I do not like it.

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