From the campaign:
Castle Dice is the dice drafting, worker placement, big box game of castle building in a barbarian infested frontier land for 2-4 players. The game also features an engaging solitaire version for expanded playing options. To win, you'll have to plan well, make good tactical decisions, hire workers and out maneuver your opponents in gathering the correct resources to complete upgrades to your castle all while holding back barbarians raids.
Or to put another way... Castle Dice is a Euro-style game with a ton of custom dice, lots of tactical and strategic choices, a strong focus on drafting resources, and a fast paced turn sequence that allows an entire game to be played in about 45 minutes.