CastleUp is a competitive card game for 2-4 players where you build and expand your own city in the Middle Ages. Combining strategy with deck and tableau building, every decision matters as you grow your city. Unique mechanics, like cards flipping when damaged, add tactical depth. Resource management and strategic choices are key to victory. The Feasts & Fury expansion adds 13 new cards, introducing fresh abilities, greater replayability, and enhanced strategy while working within the same core mechanics of the base game.