Save File Location
A lot of people have asked where the save files are located, so I thought I'd pin a topic for anyone else who might be wondering.
Save files are in your AppData folder:
C:\Users\<username>\AppData\LocalLow\Blue Bottle Games\Ostranauts\
where <username> is your Windows username.
There is a folder for each save slot, and inside each folder there are a handful of files:
saveInfo.json - preview info for the save
portrait.png - the preview portrait for that save
<captain>.json - the current save file for <captain>
<captain>.bak - backup of previous save file
<captain>_1...9.bak - older backups of save file
If you are going to share a save, only the first three files are necessary (2 json and 1 png). And zipping them makes them much smaller.
Hope this helps!
Dan Fedor - Founder, Blue Bottle Games