Warner Bros Games and developer Turtle Rock Studios have announced that the third expansion for Back 4 Blood will release on December 6th. Called River of Blood, it will offer a new story campaign, new allies, new monsters, weapons and more.

The expansion main content will be the all-new campaign, that will offer an enthralling five map mission that has players traveling upriver, stopping at different points along the way to collect supplies and take on new enemy threats.

To better assist the Cleaners with this mission, the expansion introduces Tala, a former cultist outcast now turned Cleaner who is accompanied by a Ridden companion named Jeff, a friendly Tallboy that can be summoned to assist the team. Jeff causes ultimate mayhem when called upon via whistle by Tala or other Cleaners on her team. River of Blood also includes eight exclusive character skins and 12 exclusive weapon skins, along with new weapons, accessories, and cards.

Check out the below infographic to get an idea of all the content that is included.

While the above content is something that must be bought, though it is included within the Season Pass, the game will also score a free update called Trial of the Worm.

With this players will find a new co-op PVE mode where players will forge their own path across a four-map chain, earning Supply Points as they do.

Players can add Corruption Modifiers or choose the more vigorous paths to increase difficulty and boost the amount of Supply Points rewarded. Those looking for a challenge or a more customised difficulty can work towards completing Trial of the Worm with a high score to earn a top spot on the online leaderboard.

Both the paid DLC and the free DLC will arrive on December 6 for all platforms the game is on