Version
This article is for the PC version of Stellaris only.
Random events
The first time a planet is 
terraformed there's a chance that a terraforming event will take place. Most events can happen multiple times per game. Planets terraformed into an Ecumenopolis cannot trigger these events.
The chance of any specific event triggering is that event's weight divided by the sum of the weights of all currently valid events, plus a weight of 10 for no event. When terraforming an uncolonized planet that isn't a 
Tomb World or 
Barren World to your main species' preferred non-
Gaia World climate, the sum of all valid event weights is 26 for regular empires and 28.5 for 
Gestalt Consciousness empires (some other minor conditions also apply). This gives the following set of minimum weights for no event or a specific event (and maximum weight for any event):
| Event |  |
|
|---|---|---|
| Any event | 61.5% | 65% |
| No event (weight 10) | 38.5% | 35% |
| Event weight 3 | 11.5% | 10.5% |
| Event weight 2 | 7.7% | 7% |
| Event weight 0.5 | N/A | 1.8% |
Events[]
Superfluous Terraforming Equipment
After completing the terraforming of [planet name], our terraforming specialists have spotted a golden opportunity. The remaining terraforming equipment can potentially be repurposed as infrastructure for the planet.
Trigger conditions:
|
Is triggered only by:
3/SUM% chance |
Option conditions
 We could use more housing.
Just scrap the equipment.
| |
Engineered Beauty
Terraforming on [planet name] has finished faster than initially estimated, which has left our terraforming specialists with time to experiment, and the results are impressive. The planet's natural traits have been enhanced to be both aesthetically pleasing and utilitarian.
Trigger conditions:
|
Is triggered only by:
3/SUM% chance |
Option conditions
Marvelous! The planet gets the modifier: Engineered Nature
 
This [Root.GetPlanetMoon] has been engineered to provide both form and function to its inhabitants.
Does it have to look so artificial? The planet gets the modifier: Natural Beauty
The scenery on this planet is simply beautiful, anyone living on this planet will be constantly finding new wonders to behold.
| |
Terraforming Complications
Our long project on [planet name] has frustratingly ended in partial success. As the final valleys were undergoing terramorphing, a malfunction occurred in the biomass realigner, leading to the creation of large swaths of Terraforming Residue. While not dangerous to our colonists, it means that the planet is a bit more cramped for the time being.
Trigger conditions:
|
Is triggered only by:
3/SUM% chance |
 Don't let this happen again.
| |
Learning From Mistakes
Our [Owner.GetTerraformerPlural] have now cleared the final Terraforming Residue on [Root.GetName]. While the cleanup was painful and quite sticky, it was not all for naught. Analysis of the cause of this issue and the fallout has led to furthering our understanding of terralurgy.
Trigger conditions:
|
Is triggered only by:
Clearing all |
At least some good has come of it.
| |
[homeworld name] II
We have not only succeeded in terraforming [planet name], but we have done something even better. During the final stretch of the process, our terraforming specialists managed to make it a perfect home for our local fauna, creating a [planet or moon] eerily similar to [homeworld name]. All our local plant life is there but none of the familiar terrain.
Trigger conditions:
|
Is triggered only by:
2/SUM% chance |
This [planet or moon] shall be known as [homeworld name] II
A fortuitous development.
| |
A Planetary Gambit
A unique situation has occurred on [planet name] just as the terraforming efforts are winding down. Our terraforming specialists have discovered that it's possible to tidally lock the [planet or moon]. This occurring naturally can be quite a detriment to a colony. However, doing it during the terraforming process could allow us to exploit the endless solar hours the dayside will receive and generate an obscene amount of energy. We would still have to make a concentrated effort to set up the rest of our industry and housing on the twilight and night side.
Trigger conditions:
|
Is triggered only by:
2/SUM% chance |
Set the [planet or moon] spinning again, the risk is too great. No effect Do it.
| |
Excess to Success
As the terraforming of [planet name] is settling down, we discover that the project has put us in an unanticipated situation. We did not need as many resources as we initially set aside to finish this project, and now we have the chance to add-on one additional feature to the [planet or moon]. Our terraforming specialists have presented us with three different options.
Trigger conditions:
|
Is triggered only by:
3/SUM% chance |
We could use more Generator Districts.
See if we can't develop more space for Mining Districts.
This world could use more Agriculture Districts.
| |
Oneness
While turning [planet name] into [planet class] world, the terraforming drones managed to link not only the local fauna to the mind but, through freak mutations when exposed to the terraforming gasses, link the mind to the world itself. The collective now has the opportunity to become whole in a truer sense than before.
Trigger conditions:
|
Is triggered only by:
0.5/SUM% chance |
Yes, the mind wills it.
No, this is not the intention for this world.
| |
Perfect Organization
Surpassing nature is not something new for this collective. During the terraforming process of [planet name], every hill was considered, and every piece of fauna was strategically placed. The [planet or moon] has now ended up being a perfectly organized logistical paradise for our Autonomous drones to produce for the collective.
Trigger conditions:
|
Is triggered only by:
2/SUM% chance |
How pleasing.
| |
A Helpful Blemish
What our terraforming specialists first took for a nasty gas pocket on [planet name] has turned out to be a blessing! The toxic fumes it was releasing are an unrefined version of Exotic Gas. With this new natural resource, the energy required to introduce an atmosphere to the [planet or moon] has drastically decreased, and we can harvest the gas for years to come!
Trigger conditions:
|
Is triggered only by:
3/SUM% chance |
Excellent.
| |
Unexpected Mutations
Our terraforming specialists have good news and bad news for us about [planet name]. The good news is that the terraforming process went swimmingly, and we have a beautiful Gaia World. The bad news is that everyone living on the [planet or moon] was exposed to the terraforming gasses and now can't live on non-Gaia Worlds. These Gaia-trapped inhabitants have surprisingly been showing an increase in their productivity while on the Gaia World. Far better than workers that weren't affected by the gas that migrated there later.
Trigger conditions:
|
Is triggered only by:
2/SUM% chance |
At least they don't seem to be uncomfortable.
| |
Paradise is a Place on [planet name]
The below description is one of several available for this event.
Amongst our terraforming specialists assigned to [planet name], there seem to have been followers of an ancient sect from [homeworld name] among them. These [main species plural] believe that there is a paradise for our people, and instead of looking for it, they have now created it. [planet name] has now been turned into a [planet or moon] of the blessed, looking like an illustration manifested from the pages of our ancient history.
Trigger conditions:
|
Is triggered only by:
2/SUM% chance |
Option conditions
It's beautiful.
  It's just a normal Gaia World?
| |
Radioactive Flora
While cleaning out the radiation in [planet name]'s atmosphere and soil, our terraforming specialists had to call in our xenobiologists. They had found a species that seemed to thrive off the radiation and was now wilting. Even more curious, this species appears to be presapient and on the cusp of achieving sentience. Now, as the final soil scrubbers are approaching, we have to decide what to do with this new life.
Trigger conditions:
|
Is triggered only by:
2/SUM% chance |
Option conditions
We have destroyed their habitat, now we have to preserve them.
Why not let them join us?
Harvest their genetic material.
Why are we even bothering with this weed. Finish the terraforming.
| |
A Radiating Reception
Having spent years acclimating and adjusting the radiotropic plants found on [FromFromFrom.GetName], we now are ready to allow them into our society. While an incredibly young species, they seem to excel in harvesting energy.
Trigger conditions:
|
Is triggered only by:
Completing the Enlighten the Radiotropic special project |
Welcome!
| |
Weapons Cache
Restoring a Tomb World is always hard work and often very repetitive: section off an area, clear out any rubble, replace the soil, purify any remaining water, and add new fauna. As the terraforming process on [planet name] was winding to a close, our [Root.GetTerraformerPlural] discovered a sizeable underground metal container, and based on its fortifications, it is assumed that this is a weapons cache.
Trigger conditions:
|
Is triggered only by:
2/SUM chance |
Curious.
| |
