Here is the full list of all 12 Occurrence at JCR Outpost achievements.
Talk to someone while they're doing their business
Learn about the current situation at JCR Outpost
Take science too far
Decypher the hidden message
Open the gate
Survive the Occurrence at JCR Outpost
Pass out from not taking care of yourself
Fail to survive the Occurrence at JCR Outpost
Use an item to defend yourself
Talk to a man wearing a funny hat
Talk to a man not wearing any pants
Talk to a naked man wearing a funny hat