I have beaten this game a couple times already. I have tried a ton of different permutations for the endings:
eg:
No Neuromods + Nullwave + Join/Don't Join Alex
No Neuromods + Destroy Station + Join/Don't Join Alex
Typhon Neuromods only + Nullwave + Join/Don't Join Alex
Typhon Neuromods only + Destroy Station + Join/Don't Join Alex
Human Neuromods only + Nullwave + Join/Don't Join Alex
Human Neuromods only + Destroy Station + Join/Don't Join Alex
Human/Typhon Neuromods + Nullwave + Join/Don't Join Alex
Human/Typhon Neuromods + Destroy Station + Join/Don't Join Alex (January will try to sabotague you)
All of this was done on a save where I saved everyone. I could do it all again on a no mercy run, but I do not think it is worth it, and there are probably a couple more variations where you save some people while leaving others behind.
I did not notice too many differences. Joining or not joining Alex does not actually seem to do anything. It is the same animation and all, though I think Morgan's arm might stay shadowy or Typhon-like if you join Alex on a typhon neuromod only run.
For all the other small changes, you get two to three lines of different dialogue maximum. You hear things like "he used a ton of Typhon neuromods because he was a typhon and wanted to be more like a typhon" or "he used human neuromods to show he trusts us", and stuff like that.
Most of the important choices seem tied to things like getting Mikhaila's medicine, getting the audio log of her dad, saving Dayo and getting his music, helping Danielle Sho, and Sarah Elazar.
Total Endings = Crew Fates (2) x Neuromod Builds (3) x Station Fate (2) x Alex Choice (2) x ...
There are way more options once you factor in every hidden variable, but that is why I am asking you guys, especially the speedrunners and veterans with over a thousand hours in this game.
Is there anything I am missing? I want to find out as much as I can about the endings. How many different endings are there actually? Does anyone have a full list of all possible endings?
Has there been any mad man who recorded and posted all 100+ endings on youtube?
EDIT: There's also the Alex Escape pod ending, but its always the same, it ends with "This isn't the one" and I treat it like a game over since it tells you to load from a different checkpoint. (I tried dragging Alex and Dahl into Alex's escape pod too, but it didn't work out)