{
  "Alien Spawn": true,
  "Star Crawler Spawn": true,
  "Alien Zombie Spawn": true,
  "Alien Village Structure": true,
  "Meteor Structure": true,
  "Venus Bullet Structure": true,
  "Venus Tower Structure": true,
  "Oil Well Structure": true,
  "Crimson Village Structure": true,
  "Player Oxygen System": true,
  "Entity Oxygen System": true
}