Castle Builders Board Game is a quick and competitive game where players are tasked with building the most important places in a new castle. As one of the king's builders, you must construct the top of the towers, as that is where the king will focus his attention. The more you can showcase your progress to the king, the higher your chances of receiving an extra award.

The game features various build gaming pieces that players can use to directly construct the castle, as well as special gaming pieces that can be used to disrupt the construction efforts of opponents. Castle Builders offers different game modes, including singleplayer against AI and hot-seat multiplayer for a two-player game using one device. Additionally, the game includes both the original game and game variants for added variety.

Castle Builders Board Game is a free app available on the iPhone platform. It is based on the original board game design by Björn Jansson and Daniel Johansson, and features sound effects from freesound.org. The app has been created with permission from the original game designers, ensuring an authentic and enjoyable gaming experience.