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Stellaris Dev Diary #376 - Announcing BioGenesis and Stellaris: Season 09

Metal rusts. Flesh adapts.​


It’s my great pleasure to announce the start of Stellaris: Season 09, with the BioGenesis expansion leading the way alongside the Stellaris 4.0 ‘Phoenix’ update.


The future of evolution is here. BioGenesis continues our remastering of the Ascension Paths by granting you unprecedented power over life itself and hatches May 5th, 2025.


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Evolution had its chance. Now it’s our turn.​

Two Biological Shipsets

Command living fleets that evolve alongside your empire. Customize these genetic marvels for specialized roles, from ferocious Maulers to adaptable support Weavers, each capable of empowering allies and weakening foes.

Three New Origins
  • Evolutionary Predators: Push the boundaries of Species Traits by unlocking and combining unique phenotype abilities to craft the ultimate adaptive empire.
  • Starlit Citadel: Solve the mystery of your empire’s biological attackers while boosting hyperlane choke-point strategies with early access to the Deep Space Citadel megastructure.
  • Wilderness: Begin as a sapient planetary ecosystem, a living gestalt of countless lifeforms united in harmony, seeking to spread its consciousness to the stars.
Overhauled Genetic Ascension

Choose from three Ascension paths (Cloning, Purity, and Mutation) and over 18 enhanced Authorities. Customize your genetic ascension by blending Purity, Cloning, and Mutation traditions into a unique path for your play style.

Hives with a Twist

Encounter a Hive Fallen Empire, a fractured hive mind struggling to awake between its three splintered personalities.

Six New Civics
  • Genetic Identification, Crowdsourcing, Familiar Face, Aerospace Adaptation, Shared Genetics, Civil Education
Deep Space Citadel Megastructure

A versatile new defensive station capable of holding off powerful enemy fleets at any system.

Behemoth Fury Crisis Path

The apex predators of the stars are not bound by petty limitations. Cast off the biological weaknesses that hold you back, and become a force of nature.

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The BioGenesis expansion includes:​

  • Gestalt Hive Empires (also unlocked by Utopia)
  • Two biological Shipsets with distinct mechanics from traditional spacecraft
  • Three new Origins
    • Evolutionary Predators
    • Wilderness
    • Starlit Citadel
  • Civics
    • Genetic Identification
    • Crowdsourcing
    • Familiar Face
    • Aerospace Adaptation
    • Shared Genetics
    • Civil Education
  • Deep Space Citadel Megastructure
  • Biological Ascension (also unlocked by Utopia)
    • Expanded with BioGenesis to include a mutable tradition tree that reflects your path through Ascension
  • Exploration of the effects of Biological Ascension on society
  • Advanced Government Forms
  • 16 new genetic Species Traits, including phenotype based traits
  • Portraits that change based on pop strata and leader level
  • The Splintered Hive Fallen Empire
  • Two Diplomatic Rooms and City Sets
  • 7 music tracks
  • And a new Player Crisis Path - Behemoth Fury

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Planned Dev Diary Schedule
March 27​
Biological Ships and Mechanics​
April 3​
Ascension, Traditions, Advanced Governments​
April 10​
Phenotype Traits, Evolutionary Predators Origin​
April 17​
Deep Space Citadel, Starlit Citadel Origin​
April 24​
Hive Fallen Empire, Wilderness Origin​
May 1​
Civics, Behemoth Fury, Preliminary Release Notes​
May 5​
BioGenesis Release Date​


Stellaris: Season 09 Expansion Pass​

The Stellaris: Season 09 Expansion Pass is your gateway to an entire year of cosmic evolution, psionic mysteries, and apocalyptic infernos. With instant access to the exclusive Stargazer Species Portrait, this expansion pass delivers three major content packs that will redefine the Biological and Psionic Ascensions and the most ambitious species pack so far!

Purchasing the Expansion Pass grants access to all four DLCs as soon as they become available.

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Stargazer Species Portrait (Instant Unlock)​

Dream of the stars with this exclusive portrait, available immediately upon purchasing Stellaris: Season 09. Featuring three variations and unique animations, the Stargazer Species Portrait is perfect for players who seek to embody the spirit of cosmic curiosity.

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BioGenesis (Releases May 5, 2025 - $24.99)​

Take command of the forces of life itself in Stellaris: BioGenesis. Engineer living ships and wield advanced genetic tools to shape the destiny of your empire. Will you create a utopia of adaptation and growth or weaponize biology to dominate the stars?

  • Overhauled Genetic Ascension: Choose from three distinct paths—Cloning, Purity, and Mutation—and customize your evolution.
  • Living Ships: Command biological starships that evolve alongside your empire.
  • Player Crisis Path: Unleash the unstoppable Behemoth Fury on the galaxy.
  • Three New Origins: Play as evolutionary predators, a sapient planetary ecosystem, or a fortress civilization.
  • New Megastructure: Construct the Deep Space Citadel to control hyperlane choke points.

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Shadows of the Shroud (Releases Q3 2025 - $19.99)​

The psionic plane holds untold power—but at what cost? Shadows of the Shroud is a complete overhaul of the Psionic Ascension path, introducing new moral dilemmas, Patron allegiances, and a whole new way of interacting with the mysteries of the Shroud.

  • Breach into the Shroud: Shape your empire’s spiritual destiny with a revamped Shroud system.
  • Shroud Panel: Track your empire’s attunement and unlock new powers.
  • Revamped End of the Cycle: The ultimate deal with the devil—can you delay the inevitable?
  • Psionic Auras: Let your Shroud influence shape entire star systems.
  • New Content: Origins, civics, ships, government types, and more!

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Infernals Species Pack (Releases Q4 2025 - $12.99)​

Forge your destiny in the Stellaris: Infernals Species Pack - our most ambitious Species Pack ever. Adapted to relentless heat and volatile landscapes, you wield the power of extreme environments to reshape the galaxy. Will your empire thrive in the heat, or be consumed by the very forces it seeks to command?

  • Player Crisis Path: Burn the galaxy to ashes as your empire thrives in destruction.
  • New Origins: Unearth ancient kin or endure the scorching wrath of a dying sun in two new Origins.
  • Volcanic Worlds: A new planetary class with unique districts, events, and archaeological sites.
  • New Species & Customization: Ships, portraits, civics, and more!

The Stellaris: Season 09 Expansion Pass is now available for purchase for $44.99 or regional equivalent, a 20% discount over purchasing the contents individually.​


What’s Next?​

This Thursday we’ll flesh out the bio-ships!

See you then!

MEAT SHIPS! MEAT SHIPS! MEAT SHIPS!


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BioGenesis is now available for pre-purchase for $24.99 or regional equivalent,
or with a 20% discount as part of the Stellaris: Season 09 Expansion Pass, which is available now for $44.99 or regional equivalent.
 
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I'm a sucker for Spiritualist/Psionic content, but reading the description of the planned expansion, there is one thing that rubs me the wrong way, always has with Psionics in this game actually. Namely, your reliance on outside powers, of having patrons, of enslaving yourself, of being the eternal victim, the lesser partner, the pitiful vassal eating scraps from under the table.

All ascensions are ultimately about taking your destiny into your own hands, about shaping and forging your own future, overcoming all shackles and limitations set by reality (to the point of Cosmogenesis changing reality itself). Yet, when it comes to Psionics, it's always the same: randomness, chaos, becoming a slave to the whims of some wannabe gods, and all flavor text makes it clear that the Zroni are always better than you could ever be, taunting you over and over.

I don't mind whoring myself out to the Shroud on my way to the top, but I don't want servitude be the final stop on that road. I want the same theme that bio and machines have: ultimate mastery of your chosen craft.

I also think that Psionics content should not be chained to the idea of the Shroud because it is too limiting. There are many different forms of psionics in sci-fi, WH40k is just one of them, no need to make it default.

From a writing standpoint: what if the Shroud was just one of several reservoirs of psychic force? Maybe there could be psychic powers and entities that exist outside it, maybe even have conflict with the Shroud and entities that live there. It would make sense, considering what we know of Zroni.

At the very least, there should be an option for psionic species to outright reject all alliances with the Shroud entities and carve their own path without missing on content. A separate event, perhaps.
 
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I also think that Psionics content should not be chained to the idea of the Shroud because it is too limiting. There are many different forms of psionics in sci-fi, WH40k is just one of them, no need to make it default.

From a writing standpoint: what if the Shroud was just one reservoir of psychic force, not the entirety of it? Maybe there could be psychic powers and entities that exist outside it, maybe even have conflict with the Shroud and entities that live there.

At the very least, there should be an option for psionic species to outright reject all alliances with the Shroud entities and carve their own path without missing on content. A separate event, perhaps.

I definitely think the 40k elements should be toned down and 100% agree there should be entirely patron-free options, but adding multiple sources of psionic abilities seems convoluted and a bit incoherent. I would like to at least have the breadth of pops that use the shroud for abilities that are mostly focused on the material world (telepathy, telekinesis etc) while also allowing for people that dive deeper for the more esoteric things.

And my pet wish: for an egalitarian society to be able to establish some sort of domain/ability where power's are shared. Perhaps some form of collective belief warping reality as a counter to a more authoritarian creation of a chosen one.
 
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I must say, I really like the direction that this year's set of DLC is exploring, and I hope we see a similar vision for future years.

The Machine Age was easily the best expansion that we've seen in a number of years, I do think that Nemesis overall was a great step towards that, although some were more conflicted, the introduction of the first Crisis was great. Cosmogenesis also delivers really well on what it is.

Glad to see that there will be more coming.

I'm still hoping that in the future we can get even more diverse options from a Fleet Standpoint too, like having empires evolve differently from each other, like a version of the Commonwealth of Man that went with a Mobile Suit Style of units backed up with a smaller array of traditional Ships. And then another option that consists of perhaps Corvettes, Cruisers, Battlecruisers, and Super Titans (or similar), for a non-standard Empire. Honestly I'd like to see an entire rework of the fleet system, as the years have gone on I basically never look at them in-system anymore, very rare I actually watch their battles.
 
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Most agreements are useless. Improving relations with another empire comes down to pressing four buttons: Improve Relations, Establish Embassy, and two other random agreements. After these actions, you’ll have +500 relations. Tech trade gives too small of a bonus and is implemented in a very basic way. A migration pact can let you colonize new planets, but beyond that, due to the lack of internal politics, new citizens of another species don’t have any real impact.

There’s no real incentive for trade beyond the limited system currently in the game or for cooperation. You can’t create a shared economic zone with another state. Honestly, if the entire galaxy outside my borders were deleted and only appeared when I pressed the "Diplomacy" button, the game wouldn’t lose anything. The player spends most of their time inside their own empire, developing planets, researching anomalies and archaeology, or waging wars. Diplomacy takes up less than 1% of the player's effort.

The Galactic Community is too slow and pointless. 90% of the resolutions have no real impact. Forming the Galactic Imperium is cool in theory, but in 90% of cases, the player only does it after already conquering half the galaxy.

I want the game to have situational alliances with unique mechanics, alliances that could remain temporary or evolve into something greater. I want diplomacy to actually change borders. The simplest example is that I should be able to demand a planet inhabited by my primary species. Right now, your species can literally be enslaved in a neighboring empire, and the only way to deal with it is through war, either by ideology shift or full conquest, which also feels like a very limited solution.
the game is slowly improving and if this season is anything to go by I think diplomacy will be addressed in the future. It was already hinted at that espionage will be changed in the future and currently in the beta federations is now a tech, so perhaps diplomacy will be getting some improvements (at least the tradition)

Definitely agree that many of the pacts lack depth or consequence and many of the resolutions don’t justify the wait time for how much impact they have.

But there is room for improvement, we finally getting meat ships along with a full bio rework and psionic rework. I’m sure diplomacy, piracy and warfare will be looked at soon enough
 
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Will Shadows of the Shroud also grant psionic empires THREE ascension paths, as with machine and biological ascensions (that also get three ascension paths)? Please, I beg of you to give three ascension paths for psionics as well.
 
None of these things are to be fixed through DLC content.
So, these issues will never be fixed, and these systems, at best, will go from bad primitive to just primitive, or maybe even decent primitive. The amount of work needed is too large to allocate resources for it outside of a DLC.

And I have to disagree with you on one thing. Machine empires were added to the game with the Synthetic Dawn DLC. Then we got a second DLC on the same topic. I don't see why espionage couldn't get a Nemesis 2.0.
 
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the game is slowly improving and if this season is anything to go by I think diplomacy will be addressed in the future. It was already hinted at that espionage will be changed in the future and currently in the beta federations is now a tech, so perhaps diplomacy will be getting some improvements (at least the tradition)

Definitely agree that many of the pacts lack depth or consequence and many of the resolutions don’t justify the wait time for how much impact they have.

But there is room for improvement, we finally getting meat ships along with a full bio rework and psionic rework. I’m sure diplomacy, piracy and warfare will be looked at soon enough
*looks at the game's release date*
Yeah… the game is improving really slowly. Maybe I’m being too pessimistic - all three new DLCs look interesting, but they expand the game horizontally rather than adding depth.


I’m not sure how active you are on the forums, but maybe you've seen discussions about how the rework of the construction system feels strange, and it's unclear what problems it’s supposed to solve. I agree with that sentiment, and it bothers me that they decided to rework one of the best systems in Stellaris instead of fixing the ones that actually have issues.


I’m not saying the rework is bad, but I don’t see how it’s better than the old system - it’s just different. Now, if they at least separated the state and private sectors… Ah, dreams, dreams.
 
I also think that Psionics content should not be chained to the idea of the Shroud because it is too limiting. There are many different forms of psionics in sci-fi, WH40k is just one of them, no need to make it default.

From a writing standpoint: what if the Shroud was just one of several reservoirs of psychic force? Maybe there could be psychic powers and entities that exist outside it, maybe even have conflict with the Shroud and entities that live there. It would make sense, considering what we know of Zroni.

At the very least, there should be an option for psionic species to outright reject all alliances with the Shroud entities and carve their own path without missing on content. A separate event, perhaps.
I agree. This is very doable and adds to variation (just look at the variation in the Machine Age DLC - the three ascension paths were VERY different from one another). Having all three ascension paths limited to a shroud covenant just seems way too similar on one level, and it limits empires that are rebellious.
 
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adding multiple sources of psionic abilities seems convoluted and a bit incoherent

I think they can make it work, if they further differentiate Psionics and the Shroud. Basically, make it clear that psionic power is like a force of nature and it is present in various forms and doses throughout the universe. While the Shroud is a concentrated pool of that psionic power. Meaning that there is only one source of psionic power, but there are different manifestations of it, including the Shroud.

Then as a player you can make a gameplay choice on how to develop psionic potential of the species, whether to engage with the Shroud or not. Choosing the Shroud and communicating with its entities could be a faster way to access psionic powers and those powers could seem more powerful too. But there is the catch, the Shroud is full of malevolent entities and they don't provide help for free. While the alternative option would be to shun the Shroud and develop psionics straight from the source. Maybe at first powers would not be as powerful as those of Shroud-explorers and the learning would be slow, but you choose your own path and don't endanger your species. The good thing about it is that there is no need to explain what "the psionic power" is. Keep it vague, so players can interpret it similar to the Star Wars' Force, for example. They could create something similar to Jedi, without having to bring in the baggage of the Shroud/Zroni storyline.
 
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Nice! I just hope Infernals will have a way of interacting with molten worlds, same as Toxoids should have gotten with Toxic worlds. I still think that was a missed opportunity
 
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BioGenesis is now available for pre-purchase for $24.99 or regional equivalent,
or with a 20% discount as part of the Stellaris: Season 09 Expansion Pass, which is available now for $44.99 or regional equivalent.

44.99/57.97 = 0.77609108159392789373814041745731

24.99+19.99+12.99 = 57.97

Can Paradox Interactive please be mathematically correct to at least zero decimals? I get rounding is respected, but come on more than a 10% rounding error is literally unplayable.

Being charitable, some person in marketing went "24.99*0.8+19.99*0.8+12.99*0.8 = 46.376 is not a great price to sale at." I get it, marketing may have final say on the materials produced for media. Please be mathematically consistent.
 
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Maybe bio-ships are somehow similar to beastmasters?
 
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So
44.99/57.97 = 0.77609108159392789373814041745731

24.99+19.99+12.99 = 57.97

Can Paradox Interactive please be mathematically correct to at least zero decimals? I get rounding is respected, but come on more than a 10% rounding error is literally unplayable.

Being charitable, some person in marketing went "24.99*0.8+19.99*0.8+12.99*0.8 = 46.376 is not a great price to sale at." I get it, marketing may have final say on the materials produced for media. Please be mathematically consistent.
So wait you're mad because they're advertising it as a 20% discount and not a 22% discount? Whats the problem here champ?
 
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