Empire in Decay is a roguelike deckbuilding turn-based tactical game, loosely based on chess. Its gameplay has been broadened with the use of cards and the progression of units. In the game, you'll proceed through procedurally generated routes across the districts of Daandria, the capital of the Empire.

In your journey to the Throne Hall to face the King, you will have to fight turn-based combats through different locations, collect cards and upgrade them, recruit units to support your cause and enhance them, find relics and forge artifacts to boost your powers, and use all your cunning and skill to make your way through waves of enemies.