DLC / add-on · Owlcat Games
Warhammer 40,000: Rogue Trader - The Infinite Museion
- Co-op
Delve into a secret vault curated by Trazyn the Infinite himself. Discover Trazyn’s obsession with the Von Valancius dynasty, and choose whether to disrupt or fulfill his plans.
Before you buy
- Redeem on
- Steam clientPC: Windows, macOS. Needs a free Steam account.
- Activates in
- Europe and UK. Activates on accounts registered in 32 countries: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, United Kingdom.Activates on accounts registered in the EU, EEA, Switzerland and the United Kingdom.Will not activate on accounts registered in North America, Asia, Latin America or Oceania.
- You get
- A digital activation keyAn add-on. You need the base game on the same account.
- Delivery
- To your account and by emailDelivered to your account and by email once it is ready. Some orders get a short manual check first.
Trailers and screenshots
About this add-on
“The Infinite Museion” is the third story expansion for Warhammer 40,000: Rogue Trader, drawing you into the iconic vault of Trazyn the Infinite. Pursue rare artefacts, enhance yourself with augmentations, and choose whether to serve the designs of one of the galaxy’s most infamous collectors or oppose him.
Explore the Vault:
Follow a trail of hidden agendas and unsettling discoveries that gradually reveal a larger mystery spanning the Koronus Expanse. What at first seems like a series of isolated expeditions soon sheds new light on the past of the von Valancius dynasty. As you uncover the truth about your ancestors, your strange ally, and the artefacts you recover, you will be drawn into a fateful encounter with Trazyn the Infinite and forced to make a choice that could reshape your destiny.
A new companion:
A devout servant of the Omnissiah and Tech-Priest Manipulus with a shadowed past. A capable support specialist with unique buffs and technological abilities, he brings both battlefield utility and narrative tension to your retinue. The deeper you delve into his story, the more you must decide whether his loyalty can truly be trusted.
New augmentation mechanics:
Unlock a new augmentation system, allowing you to replace your damaged flesh with bionics. Improve resilience, alter tactical options, and experiment with increasingly dangerous modifications. As the story progresses, even more esoteric bionics become available.
Meet Trazyn the Infinite:
Trazyn the Infinite, the ancient Necron collector whose schemes span worlds, centuries, and civilisations, is no ordinary foe. With subtlety and cunning, he manipulates events from the shadows, treating people, battles, and entire histories as pieces in his collection. Whether you bargain with him, resist him, or attempt to outwit him, the encounter will leave its mark on you and your story.
Description, images and details are taken from this product's Steam page.
Details
- Developer
- Owlcat Games
- Publisher
- Owlcat Games
- Base game
- Warhammer 40,000: Rogue Trader
- Released
- 11 Jun, 2026
- Genres
- Adventure, RPG, Strategy, Indie
- Runs on
- Windows, macOS
- Activates on
- Steam client, Europe and UK
- Interface
- English, French, German, Spanish - Spain, Russian, Simplified Chinese, Japanese, Turkish
- Full audio
- English
- Single-player
- Multi-player
- Co-op
- Online Co-op
- Cross-Platform Multiplayer
- Downloadable Content
- Steam Achievements
- Steam Trading Cards
- Steam Workshop
- Adjustable Text Size
- Custom Volume Controls
- Mouse Only Option
- DualShock Controller Support
- DualSense Controller Support
- Save Anytime
- Stereo Sound
- Subtitle Options
- Surround Sound
- Partial Controller Support
- Steam Cloud
- Family Sharing
This game contains scenes and texts some people may find disturbing. They are not graphically detailed and presented from an isometric point of view, and most of them occur episodically. However, we consider it our duty to inform our players about them. You may see depictions of blood, gore, dismemberment, torture, slavery, and kidnapping in this game. It also contains textual descriptions and mentions of abuse, child abuse, sexual abuse, sexual assault, self-harm, suicide, cannibalism, and miscarriage. Player discretion is advised.
Activating it on Steam client
- Open the Steam client and sign in.
- Choose Games in the top menu, then Activate a Product on Steam.
- Paste the key and confirm. It appears in your library.
- You need the base game on the same account.
The key is listed for the Europe and UK. Activates on accounts registered in 32 countries: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, United Kingdom. region. Read how regions work before you buy.