I got 105.6%, but 105.6% of what? I've read that it goes up to 110. Every room is at level 5 and I saw 3 endings. What is there left to do for 110?

Did you complete all the research?

Yes, all research completed.

Do you have all the achievements?

How do I check that?

If you've gotten all the endings I think you'd have to have all the achievements
I'd suggest checking your world map and making sure you didn't miss any passages to other rooms. It's easy to do.

What do you think?

Edit: Cropped image better.

There's a semi-ending other than the 3 triggered in the Helm, when you leave the cave by blasting your way out at the bottom right corner of the map. You then have to go back to the base. I think this yields some percentage.

I've been to Base Camp. That's my current location with the circle around it in the attachment. You get the ATS-X2 Jetpack Upgrade for going there.

Yes, that's what I meant. Maybe you've missed a small thing that drives the story further but isn't mandatory. Have you had all radio conversations from the top of the pyramid inside the shaft? Have you finished the research for all lifeforms, terrains etc.?

As stated above, all research completed. I don't know about conversations. Once the beam of light appears I can't stand in the 2 spots where they occur without floating away.

I hate to suggest it, but did you max everything out prior to the cavern collapse and enter the chamber where the signal originated? Sadly, no way to go back after the collapse as it doesn't show on the map.

Yeah, I got max biomass in the early rooms too.

What does this percentage go by? Terrain maybe? There are rooms that don't even have a biomass level but still have terrain. Should I start planting Enriched Halids in those?

Exact same situation here.