It doesn't seem to matter whether you pick Prepare Weapons or Establish Contact, just go with the one that's easier with your crew.


Ending: ...

• Prepare Weapons/Establish Contact
  
• Translate their language
  
• Send a civilian
  
• Exclude Alien artifact
  
• Reprisals
  
• Deliver activists
  
• Demand explanations

Ending: Year 2150

• Prepare Weapons/Establish Contact
  
• Translate their language
  
• Send a civilian
  
• Upgrade Alien artifact
  
• Refuse treaty

Ending: Sea, Sex, and Fun

• Prepare Weapons/Establish Contact
  
• Translate their language
  
• Choose emissary
  
• Upgrade Alien artifact
  
• Sign Treaty
  
• Break the news

Ending: The Moon

• Prepare Weapons/Establish Contact
  
• Translate their language
  
• Choose emissary
  
• Upgrade Alien artifact
  
• Refuse Treaty
  
• Incarcerate [crew member]

Ending: Year 2150

• Prepare Weapons/Establish Contact
  
• Translate their language
  
• Choose emissary
  
• Upgrade Alien artifact
  
• Refuse Treaty
  
• "You're lying."

Ending: The end of the world!

• Prepare Weapons
  
• Attack