Healix, that's exactly the type of game I'm looking for, although, having been released in 1985, I dread finding out how badly it'd run on a PC today - if it runs at all, being way before 64-bit. It'd be great if someone published an updated version. The New-Guinea cannibals sound like an interesting, and unusual, danger to deal with.
I'm not sure how close the others are, but, since UnReal World looks to be free, I could try it at no cost. In addition, Moonbase Alpha (mentioned on the same PC Gamer list) will get a tryout, once NASA re-open their website. Having played Outpost 2 some time back, I've wanted a space-survival game that DIDN'T include enemies attacking.
Thanks for the leads, all. If anyone else has any, feel free to offer them.