Saber just dropped Space Marine 2's Anniversary Update 2 as version 15.0 on October 1, and the headline addition is Chaos in Siege Mode. Players can now take control of Heretic Astartes on the brand-new Hive map, backed by Cultists and a Helbrute while fending off both Tyranids and Loyalist Space Marines. The free content also packs in Crucible endgame PvE, a full Tactical perk rework, the One-Handed Thunder Hammer, new Heroic weapons, and Wargear customization upgrades. PvE saw major balance swings like 65% Melta Rifle damage buffs offset by harsher falloff and less ammo, while PvP tweaks include Iron Halo health cuts and scoped camera adjustments.

Community hype has been building since the August and September dev updates teased the mode, with Focus Entertainment and official accounts posting teaser videos of the Chaos forces battling on Avarax. The update lands right on the game's second anniversary, marking the start of Year 3 support that includes Season Pass 3 and more planned patches through 2027. Steam and official patch notes confirm the full rollout across PC, PS5, and Xbox Series X/S with no paywall on the core Siege and Crucible additions.

Balance changes hit hard where they count — Tactical now offers way more build variety with new melee options and reworked Auspex perks, while Melta weapons trade raw power for riskier positioning. PvP scopes moved closer to reduce peeking cheese, and several stratagem timers got adjusted. This is the kind of live-service drop that keeps the competitive scene fed without forcing a full price tag.