Two players work together to build a castle. Wall and tower pieces link to form courtyards. The player who finishes a courtyard claims it with a Keep.
Your cards determine what pieces you get each turn . . . but you decide where to put them. If you're clever, the pieces played by your opponent can end up scoring for you! Castellan includes 108 detailed castle pieces and 28 cards, and plays in less than an hour.
If you combine red/blue and green/yellow Castellan sets, you can play with three or four players.