Drop Duchy is a game that combines geometric block-stacking with strategic elements. Players must build their realm using blocks of different shapes and types, collect resources, protect their castle, and grow a powerful army. Each run presents a new landscape where tiles can be placed strategically to gain bonuses and resources. The game also features a deck-building system with over 110 unique cards, allowing players to experiment with new structures, upgrades, and modifiers. Additionally, players can trade with markets and guilds, improve their deck, and more.