Castle Builder Slots Review For 2020

Graphics 8 / 10
Sound 8 / 10
Entertainment 8.5 / 10
Bonus Rounds 8 / 10

5 Reasons to try this slot

  • Innovative bonus round
  • Win up to 200x your bet
  • Well-designed symbols
  • Premium-quality graphics
  • Wild symbol available
max bet
3,000 coins
max win

Castle Builder Slots Overview

Castle Builder is certainly an interesting online slot, and you'll find out why from reading our review. In addition to the super quirky feature, you'll also find that this exhilarating game offers some decent prizes. Check out our review below and find out exactly why so many people choose to play this game at their favourite Microgaming online casino site!

Playing Castle Builder Slots Online


Castle Builder is a slot with five reels and 15 different paylines. Experienced players will know that 15 paylines aren't that many, however, don't let this put you off. This is because you'll still find plenty of winning combinations spinning in on the reels. You can reduce the number of paylines, but why would you want to? After all, the more paylines you have, the better your chances of winning!

The graphics are also really slick. The reels are placed to one side of the screen, as the other side is devoted to the castle, which you'll build as you play. The graphics might not be snazzy and 3D, however, they're certainly good enough to satisfy most players.


You'll find a number of royal characters on the reels, including the king and his daughter, plus you'll also find building materials. Also keep your eyes peeled for the wild symbols, which are represented on the reels by the architect. They can be really helpful, as they can substitute for most other symbols.

Bonus Games

There is only one bonus, but it's a good one. Whenever you collect building material symbols on an active payline, the castle expands. You'll get different quality building supplies depending on how many building material symbols land on the reels.

But what happens when you manage to completely build your castle? Well, the princess will move in, and you'll then need to choose her a husband. You'll have three potential husbands to choose from, and the better the building materials you used were, the more money you should find yourself winning.

Castle Builder Hits:

  • Innovative bonuses
  • Really creative graphics
  • Great for mobile players

Castle Builder Misses:

  • Low maximum bet
  • Not the largest jackpot
Overall rating

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The mobile version of Castle Builder is compatible with all devices, including iPhones, iPads and Android devices. Nothing has been lost in the transition over to mobile software, meaning prizes and features have stayed exactly the same. The fact that mobile slots players get the same experience as players using a desktop shows how much all players are valued.

Mobile Gaming


Castle Builder is a Microgaming creation, which is only ever a good thing. Why? Well, Microgaming have been around since 1994, so they've got a breadth of experience within the online gambling industry. They've always got their finger on the pulse and that they've been able to create some iconic slot machines, such as Thunderstruck and Mega Moolah.

Software Provider logo


Overall, our view of Castle Builder by Microgaming is a positive one. There are, as always, a few issues, such as the relatively small jackpot, however, these minor malfunctions don't overshadow the tons of positives. The biggest is the innovative bonus feature, which sees you building a castle and collecting cash for doing so. This is certainly one of the more inventive slot machines we've ever seen online!

In this Castle Builder review, we've looked over the game in detail, and we certainly give it our seal of approval. Check out our detailed reviews to find the perfect casino for you to play this game from.

How does the Castle Builder slot work?
Castle Builder is a slot with a difference. Like most other slots, you'll need to get winning combinations across an active payline to win some money. The big prizes come when you manage to build the castle though, and this is done by collecting building materials on active paylines.
How do I play?
First, decide how much money to bet - this can be pretty much anything up to $15 per spin. You then need to get the reels spinning. After that, you simply have to wait and see which symbols spin in on the reels. Get a winning combination and you'll get an instant cash prize.
How many bonus games are there?
The only bonus game starts when you've managed to build the castle. You can do this by collecting building materials. When you've completed the castle, you'll get to choose from three different suitors, which will lead to you winning a potentially large cash prize.
What is the maximum jackpot?
The maximum you can win when you're playing this slot is 200x your bet. So, those playing at the highest stakes can win 3,000 coins per payline when they play. This means that the jackpot really isn't that high, which could put some people off playing the game.
How many paylines are there?
This slot has 15 paylines, so it doesn't have the highest number around. You should still get plenty of wins on the reels, though. The paylines at this slot are not fixed, so you can reduce the number if you want to. We wouldn't advise it, as more paylines means more chances for you to win.
How can I win at slot games?
If you're looking for a magic formula that will ensure profits when you play online slots, you won't find one. This is because slots are based entirely on luck, and there's nothing you can do to change this.
Where can I play?
There are absolutely loads of Microgaming online casino sites out there, so finding a place to play Castle Builder really isn't too tough. If you want to play at the very best online casinos, you should read through the reviews here on this site, all of which tell you everything from the games on offer through to the bonuses.
Can I play on mobile?
Many people now prefer to play online slots using their smartphones or tablets, and you'll definitely be able to play Castle Builder in this way. To play, just head to your chosen site using your mobile browser, or use an app. The gameplay is exactly the same as when playing using a desktop, as are the prizes.
Is it safe?
Play at a site we've recommended and we can guarantee that you will be completely safe. We spend a long time looking at the safety and security of a site when reviewing it, and only sites with the best security will make it onto our list of recommended places to play.