[@Arcarius] No outer guards or anything, in fact (its comin up in my next post anyway so not really spoilers) the base will appear to be abandoned when we first breach.... Appear being the operative word.

As for the layout, I had the design of the random buildings on uncharted worlds from Mass Effect 1 in mind, but probably a bit bigger on the inside, and with a second entrance point. Not sure how to embed videos exactly, but heres a link to the first mission that popped into mind that used that kind of building.

[url]https://youtu.be/X5DH5LlwqOU?t=2m18s[/url]