From publisher description:
Bulwark is a co-operative deck-building card game for 1-4 players in which you play a hero defending a settlement from an army.
It’s co-operative in that you all play as a team against the game itself, sharing victory or defeat.
It’s a deck building game in that you have your own personal deck of cards that you add to as the game progresses to make your hero stronger.
A single game takes an hour or so, depending on the number of players and the length of the Start Phase. Allow extra time if you are new to the game.