When the World is literally going to Hell in a recovered shopping cart, working together as a team is incredibly important...and getting _everyone else_ to work as a team on your behalf is even more so!
Over 13 rounds on the night of Friday the 13th of an unspecified month in an unspecified year, you - alone - will attempt to shepherd, sacrifice and/or destroy, both zombies and survivors alike in order to survive until help arrives in the morning.
Each turn, you will draw 3 cards and postpone one of them (put it to the bottom of the deck) and then must put the others into play. Various effects can be triggered - resolved in the order of your choosing - which might result in gains and/or losses before you compare your Survivor Total against the current Zombie Threat Level: if you are being overwhelmed by this threat, your community will suffer!
Simply make it through the 13 turns of the game - see the Sun rise on a new day - and you will win...
Note: Dies Irae is the third game in Tony Boydell's "Infinity" solo game trilogy (along with Lux Aeterna and Aleph Null)
—description from the designer