I hate losing leaders to old age, and now that I have a sizable synthetic population in my empire, I'm hoping to eventually replace my aging meat sack leaders with glorious eternal machines, but are they actually immortal (barring deaths related to ship destruction), or will they too succumb to entropy? I'd hate to change my leader policy and forego all those venerable species leaders just to find out that synthetics die like regular organics.

  • That's a good question. I've had the synth leaders policy before, but have yet to actually see one show up as an option. – DCShannon Jun 2 '16 at 20:25
  • Synthetic do show up as leader/governor/scientist/general/admiral option. However I don't know how long they last if at all. – Vyndicu Jun 2 '16 at 21:20

I'm 99% certain they'll act just like a normal species, that is, they'll die. If you look at the mod files you'll see that AI is created just like every other species. The only thing that could impact any species lifespan is traits. After doing some digging around I found that the trait for being a synth is trait_robotic_3. I looked through the species traits files (in the trait folder) and found this:

trait_robotic_3 = {
    cost = 0

    initial = no
    modification = no

    modifier = {
        tile_resource_engineering_research_mult = 0.20
        tile_resource_physics_research_mult = 0.20
        tile_resource_society_research_mult = 0.20
        tile_resource_energy_mult = 0.20
        tile_resource_minerals_mult = 0.20

As you can see there is nothing in here about being immortal, or even long lived. But wait, you may say, this is only the species traits file, what about ruler traits? Well, I checked those as well and there was nothing in there about immortality for anybody, including synths. Additionally, we can see that the devs can modify ruler lifespan in the species traits because this is demonstrated by the venerable trait, among others.

This makes sense from an in-game perspective as well because synths are designed to live (and die) in a very similar manner to their creator species.


Edit: regarding the Playable Robts mod.

In the current git repo there's a suspicious looking line:

playablerobots_immortal_modifier = {
  leader_age = 10000

so the leaders don't become techically immortal just very, very old.

  • 2
    There's no such policy in the base game, and its presence in your game may indicate that your synthetics' mortality may be introduced by a mod as well. – kotekzot Jun 3 '16 at 9:28
  • @kotekzot: that might just be the case, i edited my answer accordingly and will check that as soon as i can to confirm^^ – garglblarg Jun 3 '16 at 10:16

I'm playing an unmodded ironman mode, and I've had immortal leaders since fairly early in the game. The space nomads in my playthrough had the traits nomadic, natural engineers, and venerable, and kindly asked if I could put a few of them up. Whenever I look at the age of one, it is listed as "immortal, will never die of old age."

Compared to my founder species, which has the enduring trait, they should live only 60 years more. However, with a death age of 282 for my founder species, I have a Namarian (space nomad) leader that is 504 years old, along with others close behind in age.

So, this could be a glitch, or perhaps it's a a cool side-affect of venerable mixed with capacity boosters, though I forget if I had that policy enacted when I first found the Namarians to be immortal. It may not answer your question regarding synthetics, but perhaps this will enable you to have unmodded, immortal leaders, if that is your desire.

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