Underground Vault

Geological surveys conducted by our colonists on … have revealed a massive vault buried deep inside a mountain range. All evidence points towards this being some kind of fallout shelter built by the same species that perished in the …'s ancient nuclear war. The vault has been sealed for many centuries, but our instruments have detected a faint power signature emanating from within. Our scientists are eager to open the vault and discover what lies behind its reinforced doors.

The command below will trigger the "Underground Vault" event in Stellaris:

When this event fires, you can choose between these 2 options:

• Let's crack this thing open!
  • Start special project: Open Underground Vault
• Best to leave this thing be.

Conditions the game checks before this event can fire:

• Must not have ethic: Gestalt Consciousness

NOT = { has_global_flag = underground_vault_global }
NOR = {
  has_planet_flag = armageddon_nuked
  has_planet_flag = colony_event
}
is_planet_class = pc_nuked
NOT = { has_planet_flag = nuked_planet_anomalies_disabled }
NOR = {
  has_planet_flag = pre_ftls_nuked_themselves
  solar_system = {
    any_system_planet = {
      is_capital = yes
    }
  }
}
owner = {
  NOT = { has_ethic = ethic_gestalt_consciousness }
}
pop_amount > 0