The Dead Kings expansion for Assassin's Creed Unity, which is free for all players to make up for the game's launch woes, is available now across all platforms: PC, Xbox One, and PlayStation 4.

Set after the events of Unity, Dead Kings sees Arno journeying to the town of Saint Denis, which was known at the time as Franciade. Once there, Arno goes on a mission to explore the underbelly of the city, made up of catacombs and deep caves that contain the remains--and secrets--of dead kings.

Dead Kings introduces a new lantern that Arno will use to move through the catacomb networks, as well as a powerful "Guillotine Gun." Players will meet famous people like Napoleon and the Marquis de Sade, and also encounter a new enemy faction, the Raiders.

The expansion also adds a number of side quests, including new Murder Mysteries and co-op missions. Along your way, you'll also be able to unlock new weapons, gear, and outfits that are compatible with Dead Kings and the main Unity game.

The Dead Kings expansion was originally going to be part of the Unity DLC pass for Xbox One, PlayStation 4, and PC. However, Ubisoft announced in November that Dead Kings would become a free download for all players in a bid to make up for Unity's troubled launch.

The Unity DLC pass has since been removed from sale. If you bought it before it was pulled, you'reentitled to a free game of your choosing--and the list is full of great games.