Castle is a tactical FPS that combines fast-paced team combat with the strategic depth of chess. Instead of controlling a single character, you command your entire squad and switch between pieces in real time to outthink and outmaneuver your opponents.

The project draws heavy inspiration from chess, including its terminology, art direction, game modes, gameplay mechanics, and ranking system. Each character is based on a chess piece and has unique abilities designed to fit its style.

Matches consist of multiple rounds. Each player is randomly assigned a color, black or white. Before a round begins, the player chooses which pieces to send in alongside their King. In the standard format, the round ends in checkmate when a King is defeated. If time runs out or only the Kings remain, the match ends in a stalemate, as neither King can damage the other.