Cannot find Bottomless pit

[Dragomir7]

I've been trying to get the "Job's done" achievement, that is, develop all buried wonders before Sol 100. I've built two of them (Jumbo Cave, Ancient Artefact) and looked around for almost 99% of the underground already, but still can't find the Bottomless Pit or figure out how to trigger its events. I do, however, have the Underground Medium Dome prefab, and am not sure if I need to build it.

Tips anyone?

 

[Lillegre]

Mine is in a small cave, the wall is lacking on one side and you have a line of that "Yellow when moused over with the clear tool stone".

It is really hard to see in the default camera angle. If you are looking for it, rotate the camera 90 - 180 degrees and comb the map. Mouse over the walls with the clear tool and look for the yellow stone.

If you drive and explorer along the lip (like about 30 hexes, the event will pop. 10 rough stones, a drone and RC explorer are needed for sacrifice to the pit!

 

[Lillegre]

Also, how did you get your Jumbo cave to build? My drones refuse to service it.

 

[Dragomir7]

Thanks for the tips -- so far the Bottomless Pit seem to have entirely eluded me, but I managed to get the achievement after building and settling the underground dome. So perhaps it would appear in a next playthrough, will see how it goes.

For the Jumbo Cave reinforcement, I used RC Transporters to dump the resources at the NW corner (where the building resources seem to pile up), and just stationed an RC Commander there. This happened before I built the Artifact though, so if you already have that then the drone control might be a little differently wired.