Would becoming a parasite be a dead end youβd need to get yourself out of to continue?
I guess yes and no. Very old closely associated parasites live up to today, so we canβt really call it a dead end as far as life is concerned!
But I donβt think a tapeworm could advance to the next Thrive stage.
Plants IRL often produce more sugars via photosynthesis than they can actually use (kind of like what we see in Thrive). So they often literally dump it into the soil via their roots. Some of it is eaten specifically by symbiotic bacteria, but I guess anything crawling around just feeding on free sugar is less likely to be a specialised pathogen too.
As far as I can tell algae also secrete sugars at least sometimes. Could be fun to have Thrive photosynthesizers excrete excess glucose in a similar way for the little scavengers to pick up.
Could symbiosis be a system convergent with endosymbiosis or leading to the later?
I saw recently saw a NOVA documentary on Forest Ecosystems, which was where I learned this from originally.
I think that would be a great idea! People could potentially evolve into lichens, or other symbiotic organisms, with this new symbiotic system in Multicellular.
I suppose we could need regular symbiosis to be doable by autoevo too thenβ¦
The type of symbiosis I was describing would just be emerging from the gameβs other systems I suppose. Maybe it could be implemented as a type of miche?
While microbe stage endosymbiosis right now is a very separate system that is very deliberately started and ended by the player. I donβt think thatβs very easy to connect.
I think, if itβs possible to pull the develop resources together, symbiosis with existing microbe species would be a very nice feature for the macroscopic stage. Like we see with indeed lichen, tube worms (chemosynthetic bacteria), legumes (nitrogen fixing bacteria), and maybe even like in the digestive system of animals.
I get the distinct feeling that implementing the whole endoymbiosis system usable by non-player species would be a bit of a nightmare. But a rare chance of species suddenly getting a eukaryotic organelle does represent it decently enough I think.
How far do you think symbiosis could be taken in-game?
What exactly do you mean by βhow farβ? Technically endosymbiois is about the most advanced form of symbiosis I can imagine. Weβre also in the microbe stage thread, so I assume youβre still talking about that?
Indeed. Would non-endosymbiotic relations where one of the symbionts can only live in the vicinity of the partner cell exist?
and/or endoparasitism
for example, you could cut open the membrane of your preferred host cell, and swim inside, then swim around in the host cell and steal their compounds
So like a bizarre reverse version of the old engulfing mechanic?
Maybe add Methane as a gas. It can be generated using methanogenic proteins.

Other people on this thread have suggested things similar to this, and it would be great to add other food sources.
Unfortunately I think it might be too late now to add new major compounds like this one.
If itβs possible, maybe add an expansion to Thrive (like a DLC)
If anything it could be a mod in the foreseeable future.
Given the many potential ways methane could likely play a part in later stages (global warming, fuel, noxious fumes, rumination, etc.), I assume it is a matter of time before, in some form or other, methane ends up in the game. I just hope, when the time comes, someone goes back and adds it to the single-cellular level. But it does seem likely to be a while before that time comes.
It is never to late. It is just surely not going to make 1.0.0.0. But it could make 4.0.0.0, or perhaps 7.0.0.0, or even 9.0.0.0. Or it could be a mod, but I suspect EVENTUALLY methane will be officially in Thrive, in some form.
So sad Henri H. Hhhyyrylainen had to go back through all 8 previous stages to properly account for the enormous ramifications of alien cow farts, if only we had stayed on microbe stage for longer ![]()
Also wouldnβt β9.0.0β suggest Thrive would have 9 stages in the end (currently itβs 8)?
Nothing is impossible if someone volunteers to actually make the feature.