Castle Builder is a slot machine at Microgaming online casinos like All Slots, Royal Vegas and Spin Palace. This title developed by Rabcat Gaming includes aspects of arcade games in the slots gaming. In this game you embark on an extraordinary journey through fantasy medieval kingdoms. You start in one of the kingdoms. As you spin the reels and earn payouts, you simultaneously build a castle for the princess. Then you choose a match from the three knights wooing her. Having built this castle you move to the next kingdom.

The castle builder is the wild symbol. It awards line payouts only for a combination of five symbols, which is 20,000 times the line bet. You can expect very high volatility in this slot machine. The high paying symbols are places where you storage wealth that include vault, treasure chest, jewel box and cash bag. The low paying symbols are medieval royal characters like king, queen, knight and princess. They carry the corresponding playing card icons, with the princess associated with 10.

The castle construction activity is driven by the symbol that is a set of building materials. You have to collect it by landing it from left to right on active paylines as usual. Two symbols add standard materials to the castle. Three symbols add bronze materials, four symbols add silver materials and five symbols add gold materials. When you collect the required number of building material symbols you will complete the castle and win a bonus. The more of the costlier materials used in the castle, the larger the bonus will be. When the castle is completed, the princess will appear on the screen along with three suitors. You have to pick the one that she will marry. The choice randomly determines the size of your bonus. After that your building skills are upgraded so you automatically perform better in your next venture. Castle Builder is a 5x3 online slot with 15 selectable paylines.

Rabcat has developed on the popularity of this slot game to launch Castle Builder II. The choices available to the player are significantly greater. You choose an avatar for the castle builder from the three available. Each of them brings a different set of benefits to the table. Then you select a kingdom and the princess. Castle Builder II has 15 kingdoms covering different physical features and 75 buildings that are more than castles. The visuals are more detailed and the processes more complicated, but the basics are the same.