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