I'll be running a Mothership RPG campaign soon, and will start off with a Session 0. Anything I should be sure to include? Might do a oneshot as well if there's a bunch of time, this is our first time with this system and my first time as a GM. Thanks!
I would use the pre-written modules for mothership, there are a lot of really good ones.
For investigation horror I would read over some of the alexandrian articles on clues, and general advice: https://thealexandrian.net/wordpress/1118/roleplaying-games/three-clue-rule
Horror also is helped by pacing, don't be afraid to let silence sit and let tension grow but also make sure that it is building and not just the players standing around discussing.
I would highly reccommend doing: Mothership - Haunting of Ypsilon 14 as your oneshot it is fantastic. For longer term play I recommend: https://www.tuesdayknightgames.com/products/gradient-descent
Yep, planning on using Haunting of Ypsilon 14! The campaign proper will feature Another Bug Hunt, A Pound of Flesh, Dead Planet, Gradiant Descent, Desert Moon of Karth, and Tide World of Mani, with some oneshots here and there of my own design.
Will read the article you linked, thanks!