TL;DR
The Infinite Museion is the third Rogue Trader expansion, out 11 June 2026 for $17.99 (or bundled in Season Pass 2). It dropped alongside the free 1.6.0 Sixth Gargantuan Update, which folds in over 1,800 changes and hands every save a free party-wide respec. The reason build-makers care is the augmentation system housed in the new voidship compartment, Sector Bionica. Augments add a sixth layer to the build stack on top of Homeworld, Origin, Archetype, and talents, and they trade raw power against a new vulnerability stat called Ferrum Sanctum. You start meeting the new content in Act 2, and you can recruit the new companion, Eogunn Februs, no later than Act 4.
If you only do one thing first: take the free respec, then read the slot rules below before you start bolting implants onto your Rogue Trader.
What the Infinite Museion actually adds
The story follows the Necron Overlord Trazyn the Infinite and a secret vault he keeps stocked with stolen history. Pulling at it surfaces hidden truths about the von Valancius dynasty, and at the end you decide whether to wreck Trazyn's plans or carry them out. The questline is woven through the base campaign rather than walled off in a separate menu: it opens in Act 2 and pays off across Acts 4 and 5.
Mechanically, the headline is the augmentation system. Owlcat calls it the biggest mechanical addition since launch, and that holds up. It is the first thing since release that changes how you plan a character from the ground up.
Sector Bionica and the augmentation system
Augments live in a new compartment on your voidship, Sector Bionica, run by two surgeons with opposing philosophies: Genetor Ferrenc and Vivisector Martinax. There are more than 100 augments across the game, and most are found out in the world rather than bought, so collecting them becomes its own loot loop.
Every character has six body slots:
| Region | Slots | What goes there |
|---|---|---|
| Head | 2 | Perception system, nervous system |
| Hands | 2 | Main hand, offhand |
| Torso | 1 | Internal organs |
| Legs | 1 | Lower-body augments |
Adeptus Mechanicus and Forge World characters get extra unique slots on top of those six, which is the first real reason to look hard at item:pasqal and at Forge World origins again. Both were reworked in 1.6.0 specifically to interact with augments.
Two rules shape every decision you make in this compartment. First, augments are permanent once installed. You cannot pull one back out; you can only replace it with a different augment in the same slot. Second, every augment is a tradeoff. Each one carries a strong positive effect bolted to a real negative, so there is no clean upgrade. You are always paying for power with something.
That makes Sector Bionica a planning problem, not a shopping trip. Slot scarcity plus permanence plus built-in downsides means the wrong implant locks you out of a better one until you find a replacement.
Ferrum Sanctum: the stat that prices your power
Ferrum Sanctum is the new stat, and it climbs every time you augment a character. The fiction frames it as steps along the path to the purity of the blessed machine. The practical read is simpler: higher Ferrum Sanctum makes your augments and any synergizing talents hit harder, but it also raises how much electrical and EMP damage that character takes.
So augmentation is not a free power curve. The more you lean into it, the more an enemy with the right damage type can punish you. Heavily augmented frontliners want positioning and mitigation against shock and EMP sources; lightly augmented characters stay flexible. Plan your party so your most augmented members are not the ones standing in front of every Tesla weapon in the sector.
Galvanization: the overdrive button
Some augments support Galvanization, an overdrive feature. Out of combat you drop one Galvanization-capable augment into a special Galvanization slot. In combat you fire it for a major benefit that lasts one round, then eat penalties the next round.
It is a burst tool, not a sustain tool. The clean use is to time the Galvanization round with a turn you have already stacked, so the spike lands when it matters and the hangover round falls on a turn you can afford to play defensively. Pair it with action-economy buffs and it becomes a real alpha-strike enabler.
Who can and cannot be augmented
This is a hard build constraint, so check it before you plan around an implant.
These characters cannot be augmented at all, by biology or by belief:
- Astartes, because Space Marine physiology needs surgical facilities a voidship does not have
- Aeldari and Drukhari, who despise the modifications
- Cassia, who will never allow herself to be touched
- Navigator characters
item:argenta is a special case: she refuses Heretical augments but accepts the rest, so you can still build her, just not down that branch. Dedicated story augments exist for item:abelard, item:jae, item:solomorne, and Pasqal, and those are available to every player regardless of choices.
For party composition, the takeaway is that your augment plan has to route around the characters who opt out. If item:cassia and your Navigator are core to your lineup, the bulk of your Ferrum Sanctum and Galvanization power has to come from elsewhere on the bench. For the full roster and who fits where, see our companions guide.
The 1.6.0 changes worth building around
The free patch shipped beside the DLC and it touches the meta directly.
The grenade rework is the big one for theorycrafters. Damaging grenades now count as Ranged Area Weapon Attacks. They scale from Intelligence (or from Demolition with the matching talent), they can crit, and they can be dodged. That turns grenades into a genuine scaling source for Intelligence-heavy builds, which lines up neatly with Operative and Tech-Priest characters, with the augment system's Intelligence themes, and with Eogunn's support kit.
On balance, Owlcat leaned toward buffs rather than nerfs. The Operative archetype and the Assassin advanced archetype both got deliberate help as the two weakest competitive picks, and established meta builds like Bladedancer-Executioner were left alone. For where each archetype now lands, see our class tier list. Because of the scope of all this, every save gets a free party-wide respec, so you can rebuild around the grenade math, the Operative buffs, or your new augments without burning a respec resource.
The talent-selection UI also got reworked with filters and grouping, plus UI support for archetype resources, which makes laying out a fresh build noticeably faster.
Eogunn Februs, the new companion
Eogunn Februs is a Tech-Priest Manipulus and Genetor Extremis from the secretive Xenarite sect of the Adeptus Mechanicus, traveling with a servo-skull named Nuncius. For build purposes he slots in as an Officer, and his role is battlefield support: he manipulates the Motive Force through his galvani cell to buff allies and boost himself.
You recruit him through the quest "Broken Relic," which can trigger as early as Act 2 and no later than Act 4. As an Officer-archetype support piece, he sits in the same slot the build planner already models, so dropping him into an action-economy party is straightforward. If you want a template for that support seat, our Officer build guide lays out the buff loop he can step into:
Build: 03df5849ffd0His Intelligence-flavored kit also rides the same wave as the grenade rework and the augment Intelligence synergies, which makes him an easy fit in a build that wants those buffs flowing every round.
Is it worth it
If you build characters and not just play them, yes. The augmentation system is the deepest planning layer Rogue Trader has added since launch, the free respec lets you act on it immediately, and the grenade rework quietly reshapes how Intelligence builds scale. Take the respec, audit your party for who can and cannot be augmented, then start fitting implants slot by slot with Ferrum Sanctum and your electrical-damage exposure in mind.