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Footholds spawn invasions, where the monsters from the rift venture into the world to create more footholds "from which more invasions can spawn".[1] The invaders may attack other rifts[2] or mount an attack on a target such as a town[3]; if a town is taken over by an invasion, the NPCs of that town will not be present until players take the town back.[1] Invasions from different plane types will also attack each other if they meet, and rifts of the same type will assist each other if they are in the same area.[1]

Mass invasions in Silverwood.[4]

Additional Information[]


  1. 1.0 1.1 1.2 24 September IRC Chat article - Portal:News/IRC_Transcripts/24_September_2010
  2. IRC chat with Brian Clarke, Lead Environment Artist - Portal:News/IRC_Transcripts/16_July_2010
  3. Tentonhammer - Rift first look[1]
  4. Beta2 Invasions Wrap up