Warhammer 40,000: Dark Heresy Is a Standalone RPG, Not Rogue Trader DLC
Owlcat's next 40K RPG shifts the focus to Inquisition investigations, a new warband, and reworked systems.

Dark Heresy Investigations
Warhammer 40,000: Dark Heresy is a separate Owlcat RPG, not an expansion that requires Rogue Trader. The developer's FAQ also rules out treating it as a direct sequel: its story stands independently, even though players may notice references to the earlier game.
That distinction is useful before any comparison of classes or combat builds. You do not need to finish Rogue Trader to understand the intended entry point, and owning its expansions is not a requirement for this campaign.
An Inquisition Story in the Calixis Sector
Dark Heresy begins with service as an acolyte of the Inquisition. The official description places the story in the Calixis Sector, where investigating heresy involves uncovering conspiracies and interrogating suspects. Owlcat also highlights the organisation's internal tensions and bureaucracy.
The resulting premise is less about identifying an obvious enemy and more about deciding what to do with the evidence and authority available to you. That is the interesting promise of an investigative RPG: information should influence decisions rather than merely decorate the path to another fight.
The warband includes characters such as a Catachan veteran and a Kroot mercenary. Their different perspectives are part of the story pitch, not simply a list of combat roles.

Dark Heresy Identity
Familiar Studio, Reworked Mechanics
Owlcat's official Dark Heresy FAQ says the systems will be reworked for this standalone game without becoming radically different from Rogue Trader. That leaves room for familiarity without promising that an existing build guide will transfer.
The Steam description confirms turn-based battles, enemy weak points, and individual party morale. Managing the group therefore involves more than selecting a target. The strength of that combination will depend on how clearly the game communicates its choices and consequences.
For now, it is better to judge Dark Heresy's own rules as they are revealed. Assuming identical progression because the developer and universe are shared would obscure exactly what Owlcat is changing.
Beta Access Is Not a Release Date
The FAQ describes a separate Steam beta for founders who preorder through the official website. It also warns that alpha saves cannot continue into the beta. Its current beta guidance specifies English only and partial voice-over for newly added content, while full dialogue voice acting is planned for release.
Those are test-build conditions, not a description of a finished launch. The store remains marked Coming soon, and the FAQ provides no release date. Players can follow the project without treating a founder test, a preorder, or a wishlist milestone as confirmation that the full campaign is available.