Forfort

From BoardGameGeek:

Forfort is a little card game of 124 cards (31 cards per player) to build fortifications, attack your opponent and win! Players play tug-of-war, destroying their opponent forts while building their own. Your deck (donjon) is in the center of your fort. Use a card to build on one of 8 placements or discard (with symbol) to apply its effect (catapult, army, drawbridge, etc.). You have an extra bonus if you associate two symbols one next to the other in your fort. You win if you finish building your fort first or you build the most fortifications.