Description from the publisher:
Defense of the Citadel is a cooperative hero defense board game. Set in a high fantasy world, enemy forces are marching towards your Citadel in great numbers and only a handful of heroes remain to prevent them from achieving their goal.
Mission & Campaign mode
Players can choose to play set missions for a quick game with predefined objectives and events, or a more traditional defense game in campaign where the map and events are all randomized, and the status of the game carries over to the next round until you reach the final objective.
Crafting & Preparation
Players must make preparation before the inevitable battle to even out the odds. A large variety of options are available to players from crafting items, traps, infrastructure, scouting, rest or even restructuring the Citadel!
The Invasion
During the invasion, players can perform special combat skills through the usage of class skill cards. Players can mix and match different classes skills to create a unique battle strategy of their own. The course of the invasion is randomized through the invasion card deck, with many different events.
Cooperation
The enemy units are controlled by the rules of the game, there are no game masters. The game is a fully cooperative game with many game elements to promote working together, such as with crafting, battles, event choices or helping other player characters who were taken out of action to continue fighting.