Warhammer 40K: Darktide Gets New Class and Free Update Battle for Tertium

New class Adeptus Arbites was added to Warhammer 40,000: Darktide, along with the release of the free update Battle for Tertium and the launch of the Inferno event. All three novelties became available on June 23, 2025.

Adeptus Arbites class is now available for $11.99 / €11.99 across all platforms where the game is available. Its members, Arbitrators, enforce the Imperial Law, Lex Imperialis, and punish offenders.

Characters of the new class have a companion Cyber-Mastiff fighting alongside them. Besides customizable names and looks, each Cyber-Mastiff has its own passive target selection. It also follows commands to attack a specific target. Cyber-Mastiffs feature two types of attacks: knocking down and locking attacks for human-sized foes, and a staggering jump attack for larger enemies.

Cyber-Mastiffs can be distantly triggered to emit an electric impulse around themselves, dealing damage, electrocuting, and staggering nearby enemies. This ability has 3 charges, with one taking 60 seconds to replenish. While the Cyber-Mastiff is iconic to the Adeptus Arbites class, players can ditch it and choose the Lone Wolf talent.

Arbitrator characters have a heavily branched Talent Tree which allows developing a hero as an elite killer and Cyber-Mastiff handler, or as a hybrid combatant with supportive utility, choosing between crowd control and melee.

The base ability for Adeptus Arbites is Blitz – three charges of an Impact Grenade that deal high damage and stagger anything struck by it, with 4 charges in the upgraded variant.

The other one is the Voltaic Shock Mine – two charges of a device that triggers when enemies get close to it. These shock mines stay active for 3 minutes after deployment, electrocuting foes for up to 15 seconds.

As for combat abilities, Adeptus Arbites feature the twenty-second lasting Nuncio-Aquila with 60 second cooldown. The character deploys a 7.5m area where allies regenerate 7.5% Toughness per second, while enemies in that area receive +15% Damage Taken. The upgraded variant also grants allies 30% Suppression Dealt, -25% Recoil, and 30% Impact, as well as making them immune to Slowdown, Suppression, and interruption of Alternate Fire, including Braced attacks and ADS attacks.

The other combat ability, Castigator’s Stance, lasts 10 seconds and has a 45-second cooldown, granting +15% Movement Speed, 80% Reduced Damage Taken, and 100% Reduced Movement Speed Penalties from attacking, bracing, aiming, interacting, or charging heavy attacks, but it blocks the character’s ability to sprint.

Break the Line, the third combat ability, has a 20-second cooldown and works like Bash, causing high stagger to enemies in front of you, and granting +25% Damage and +50% Impact for 6 seconds.

The free update, Battle for Tertium, adds a new narrative to the game through a linear campaign that features new mission debriefs and embedded cinematics. It also brings a reworked Mission Board, weapon balance changes and tweaks, bug fixes, and new Memory Echoes that are unlockable by claiming victory in the Mortis Trials, which now has a new difficulty level.

As for the Inferno event, which will last until July 7, 2025, players can progress through it by completing missions with the Inferno condition to claim rewards such as Ordo dockets, Plasteel, and Diamantine. Completion of the event’s last tier will be rewarded with a cosmetic portrait frame.

Successor to the Warhammer: Vermintide series, Warhammer 40,000: Darktide was developed and published by Fatshark for Windows PC on November 30, 2022, later released for Xbox Series X/S on October 4, 2023, and then launched for PlayStation 5 on December 3, 2024. As of the time of writing, the game has a Mostly Positive rating on Steam with 91,258 reviews.