How many locations are there?

[Darkreaver1980]

I just beat Dead hills and i wonder how many locations with theyr own missions are there?

i guess around 5-6?

[Jhea]

1 pioneer station (command level) (prologue)
2 dead hills
3 berkleys dock
4 refinery
5 wasteland
6 pioneer station part 2 (here it is the engineering level) - also the command level has been... somewhat changed
7 atmospheric processor
8 montero deck B, (berkleys dock is the entrance to that)
9 tantalus research facility
10 pharos spire
11 refinery mining levels (as you guessed, the refinery is the entrance to this)
12 the underground city

so apart from pioneer station command deck, and maybe berkleys dock and refinery every mission has it's own map, and only on those 3 do you ever go back, but you don't have too much to do there except for running fast to an elevator once.