The C’tan in Warhammer 40,000: Rogue Trader is Nomos , a newly created C’tan-like being tied to the game’s late-story events and achievements. Community and guide references around the game point to the “kind C’tan”/C’tan fragment associated with Nomos rather than one of the classic named star gods from older 40K lore.

Quick Scoop

  • Name: Nomos.
  • Type: A C’tan-like entity / fragment, not one of the best-known full C’tan such as the Deceiver or Nightbringer.
  • Why people mention it: It’s a notable late-game revelation and achievement-related plot point in Rogue Trader.

In-game context

Nomos is presented as something unusual even by 40K standards: a “kind” or gentler C’tan-like being, which is why it got so much attention from players and lore discussion. That makes it stand out from the usual C’tan portrayal, where they’re typically ancient, predatory star gods.

Lore note

If you meant a classic C’tan from broader Warhammer lore, the most famous names are the Nightbringer, Deceiver, Void Dragon, and Transcendent C’tan variants, but those are not the specific answer to the Rogue Trader question. In the game’s case, the answer people are usually looking for is Nomos.

TL;DR

It was Nomos — the game’s special C’tan-like creation/fragments storyline, not a standard named C’tan from older lore.