If you thought your duties as a Lord Captain of the Koronus Expanse were finished, think again. Owlcat Games has just dropped a massive reason to fire up the voidship engines and dive straight back into the grim darkness of the far future.

The Infinite Museion, the third major story expansion for Warhammer 40,000: Rogue Trader, is officially available right now across PC, PlayStation, and Xbox.

Whether you are looking to finish what you started or completely reshape your legacy with a brand-new character build, this DLC seamlessly injects a hoard of ancient secrets, cybernetic overhauls, and iconic lore directly into the main campaign. Here is why The Infinite Museion gives you the perfect excuse to launch another playthrough.

1. You’re Entering the Vault of Trazyn the Infinite

For lore enthusiasts, this is the big one. The expansion draws you into the legendary, galaxy-spanning vaults of Trazyn the Infinite, one of the Necron faction’s most cunning, charismatic, and diabolical figures. Trazyn doesn’t just want to fight you; he treats whole civilisations, historical events, and prominent figures as pieces for his ultimate museum collection.

As you stumble upon hidden agendas across the Koronus Expanse starting in Act 2 (and rolling through Acts 4 and 5), you’ll find yourself playing a dangerous game of wits with an ancient alien collector. Will you bargain with him, try to outsmart him, or actively oppose his designs? Your choices will leave a permanent mark on your dynasty’s history.

2. Flesh is Weak: The New Augmentation System

If you’ve ever wanted to embrace the cold, logical purity of the Machine Spirit, your time has come. The DLC unlocks a brand-new medical compartment on your voidship: Sector Bionica.

Managed by the eccentric Tech-Priests Genetor Ferrenc and Vivisector Martinax, this bay allows you to surgically replace normal human limbs, eyes, and organs with over 100 different bionic implants.

• The Catch: Every mechanical upgrade increases your Ferrum Sanctum stat, making you a walking powerhouse of mechanical synergy but increasingly vulnerable to electricity and EMP damage.
• The Strategy: High-tier augments offer game-changing active abilities balanced by tactical penalties, forcing you to completely rethink your character builds.

Note: Choose your subjects wisely—your massive Space Marine companions, the proud Aeldari, and Lady Cassia will strictly refuse to let you touch them with a scalpel!

3. Recruit an Eccentric New Companion

What’s an Owlcat DLC without an incredible new companion to shake up group dynamics? Enter Eogunn Februs, a devout servant of the Omnissiah and a Tech-Priest Manipulus with a dark, shrouded past.

As a battlefield asset, Eogunn is a premier support specialist capable of dishing out massive technological buffs and heavy-hitting mechanical abilities. Narratively, he brings immense tension to your retinue. The deeper you dig into his background, the more you’ll find yourself questioning where his true loyalties lie.

4. Massive Perks for Heretic Playthroughs

If you’ve been looking for the perfect excuse to stray from the Emperor’s light, this update heavily reworks and rewards Heretical paths. Alongside the DLC, Owlcat has rolled out a major free patch addressing mechanical overhauls—including a massive buff to the Heretic Astartes companion Uralon, making him the terrifying powerhouse he was always meant to be. Combined with new storyline consequences and dialogue choices, a chaotic Heretic run has never felt more satisfying.

Ready to Claim Your Legacy?

The Infinite Museion adds so many layers to the early-and mid-game campaign that continuing an old save simply won’t give you the full experience. From the restructured talent UI and reworked grenade mechanics to the sheer thrill of building a heavily augmented cyborg squad, the Koronus Expanse feels entirely refreshed.

The galaxy’s greatest museum is open for business, Lord Captain. Will you be an exhibit, or the master of the vault?

Warhammer 40,000: Rogue Trader – The Infinite Museion is out now on Steam, GOG, Epic Games Store, PlayStation 5, and Xbox Series X|S.

Find out more here

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