Players first tile together wall cards to create a fortification. Then players toss rock cards at the opposing walls, scoring any wall segments hit. A tossed rock card must be from at least 2 feet way, it most be from at least 1 foot in the air, it must flip over at least once in the air, and it must no land with the 'miss' side up. Players each toss six rocks, and then then player who destroyed the most wall segments wins.
From the Box:
Only one Baron can rule the realm. Will it be you? To master the land you must build a mighty fortress and once safe behind your walls, rain rocky death from the skies upon your rivals. Do you have what it takes to reign supreme?
Clash of Catapults pits 2-6 players against each other in a battle to build mighty fortifications then destroy them with catapult rocks in crazy card flipping action.