River of Blood

River of Blood, codenamed Riverboat, is Back 4 Blood's third and final expansion of the Annual Pass that has been released on December 6, 2022.

It features an all-new campaign act, a new Mutation family dubbed Sentinel, one new Cleaner, one friendly Ally, eight exclusive character skins, twelve new weapon skins, new cards, weapons, accessories and more.

All playable content included in the River of Blood expansion is accessible by all players in a party as long as one player in that party has purchased the expansion.

On November 8, 2022, Turtle Rock Studios revealed the expansion's name, release date and an infographic to the public via Social Network Services.^[1]

New Campaign Story: Act 6[]

Main article: Campaign

This expansion expands the Campaign with a sixth Act, which consists of one Chapter and five Missions.
This will expand the Campaign to a total of 6 Acts, 12 Chapters and 44 Missions.

Players who either own the expansion themselves or have at least one player on their team who has purchased this content can jump into this Act. Furthermore, players do not need to have completed any of the previous Acts to be able to enter Act 6. Only the restrictions mentioned above are in effect.

As the Ridden Hives in the Tunnels of Terror and Act 5 from the Children of the Worm expansions were already excluded from matchmaking via Quickplay, this rule is expected to also apply to Act 6, as this content is tied to the respective expansion.

Duffel Bags are also available in Act 6.

The sixth Act includes the following Missions:

These Missions have also a chance to appear in the Mission Pool of the Trial of the Worm mode.

New Cleaner: Tala[]

Main article: Tala

Tala, a female Cleaner who is Derek's older sister and a former cultist member. She is available exclusively for owners of the third expansion. This Cleaner is not available in Swarm mode.

New Ally: Jeff[]

Main article: Jeff

Alongside Tala, a Ridden companion can assist the Cleaners with their battle against the Ridden. Jeff, a friendly Tallboy, is an A.I.-controlled ally who can be summoned via the newly introduced Whistle in order to wreck mayhem.

New Game Mode: Trial of the Worm[]

Main article: Trial of the Worm

Alongside the expansion, a new cooperative PvE mode called Trial of the Worm became part of the free update slated for the same day as the expansion. In this mode players can choose a path along a chain of four Missions in order to earn Supply Points () along the way. Players will be able to add Corruption Modifiers or choose a more challenging route to increase the difficulty and boost the amount of Supply Points rewarded. The mode features a score system alongside an online Leaderboard.

New Threats[]

The expansion introduced Six new AI threats in the form of a brand new common Ridden variant the Armored Soldier and the Sentinel Mutation types which include the Lobber, the Sentinel, Swarmer, and Wailer.
In addition, another new Mutation will make its debut in the game in the form of the Harbinger.

Expanded Arsenal[]

New items and weapons have been implemented with this expansion and are available to any Cleaner squad.

The Cleaners' arsenal has been expanded by the following new items and weapons:

Flamethrower: Expels a cone of fire incinerate Ridden that can be refueled by gas cans or propane tanks..
LAW: A rocket launcher that deals a tremendous amount of damage.
Jeff's Favorite Whistle: A dog whistle that will summon Jeff, a friendly Tallboy to assist the Cleaners in combat.

Also, new attachments that grant modifications to melee weapons and the Bow have been introduced.

New Cosmetics[]

Outfits[]

Main article: Outfits
For expansion owners, eight new outfits were added and are immediately unlocked for the following Cleaners:

Weapon Skins[]

Main article: Armory

In addition, owners of the expansion receive twelve different skins for their weapons in a bloodstained look along with the phrase "Whos next".
Like the exclusive outfits of the expansion, these skins are available to players immediately if they have purchased the Annual Pass, Ultimate Edition or the expansion individually. Two of these weapon skins are for the following weapons:

Bat
Uzi

New Cards[]

The expansion has introduced new cards that allows Cleaners to customize their play style once they have claimed them via the Duffel Bag loot boxes.

Card Name	Description	Type	Affinity
Cleansing Fire	Campaign: Gain a stacking + 5% Damage Resistance every second you're on fire, for a maximum 5 stacks lasting for 15 seconds. Fire removes most negative status effects. + 40% Fire Resistance Swarm: This card is not available in Swarm mode.	Utility	Brawn
Drone Spotter	Campaign: Begin marking nearby Mutations every 7 seconds. Gain 20% chance to negate damage while active. Gadget Cost: 20 REPLACES: Quick Slot, FRAGILE Swarm: This card is not available in Swarm mode.	Utility	Brawn
Empowered Assault	Campaign: After you kill a Mutation, the next time you damage a Mutation is guaranteed to cause them to Stumble. TEAM EFFECTS + 5% Team Stumble Damage Swarm: This card is not available in Swarm mode.	Offense	Brawn
Ether Bomb	Campaign: Emit a gas that attracts Ridden to you for 7 seconds, but also slow your movement speed by 50%. Gadget Cost: 50 REPLACES: Support Slot Swarm: This card is not available in Swarm mode.	Offense	Brawn
Hazmat Specialist	Campaign: + 35% Acid Resistance Your Bait Jars do direct damage to targets and can hit Weakspots. TEAM EFFECTS Killing Mutations that are covered with Bait has a 75% chance to create another Bait Jar. Swarm: This card is not available in Swarm mode.	Utility	Discipline
Phosphorous Tipped	Campaign: Continuos gunfire gives an escalating chance to set targets on fire. Swarm: This card is not available in Swarm mode.	Offense	Discipline
Sonic Disruptor	Campaign: Emit a pulse that deal heavy Stumble damage to nearby enemies and has a chance to knock off armor. Gadget Cost: 75 REPLACES: Offensive Slot Swarm: This card is not available in Swarm mode.	Defense	Discipline
Wasteland Chef	Campaign: Gain the ability to melee food items to create a Gourmet Dinner or a Mediocre Meal. Using the Combat Knife increases your odds of a Gourmet Dinner. Swarm: This card is not available in Swarm mode.	Utility	Discipline

Patch Notes[]

Main article: Patch 1.13

Achievements[]

Main article: Achievements / Trophies

River of Blood introduced 13 new achievements for players to unlock.
PlayStation users can obtain 13 Bronze Trophies while Xbox users can unlock 130 .

Name	Description	Trophy Grade	Gamerscore
The Path To Glory	Complete a map in Trial of the Worm with a total modifier of at least x20.	Bronze	10
Act 6 Ace	Complete all Act 6 maps on No Hope difficulty.	Bronze	10
Constant Vigilance	Kill all variants of the Sentinel.	Bronze	10
This Is Fine	Set an enemy on fire with the Flame Thrower, while also being on fire.	Bronze	10
Act 6 Cleaner	Complete all Act 6 maps on Nightmare difficulty or higher.	Bronze	10
Act 6 Veteran	Complete all Act 6 maps on Veteran difficulty or higher.	Bronze	10
And The LAW Won	Land a final blow on a Boss Mutation with the LAW.	Bronze	10
A Can Of Worms	Play Trial of the Worm for the first time.	Bronze	10
LAW and Hors D'oeuvres	Blow up a Food Item with the LAW.	Bronze	10
TR's Secret Stash	Find the Secret in Act 6.	Bronze	10
Going For Broke	Earn a score of at least 100,000 in Trial of the Worm.	Bronze	10
Act 6 Recruit	Complete all Act 6 maps on Recruit difficulty or higher.	Bronze	10
Hard-Boiled	Defeat The Harbinger without using the LAW.	Bronze	10