skos:altLabel | - first game
- Portals
- its predecessor
- Portal
- Aperture Science
- ''Portal reception''
- ''Portal''
- ''Portal'' (video game)
- Portal (video game)#Demo
- Portal (video game)#Legacy
- Portal (video game)#Portal: Still Alive
- Portal (video game)#Portal:_Still_Alive
- Portal (video game)#Release
- Portal 1
- Portal 1 & 2
- Portal film
- Portal:
- Portal: Prelude
- Portal: Still Alive
- Portal: The First Slice
- Portal_(video_game)
- Portal_(video_game)#Gameplay
- Portalarium-
- The Orange Box: Portal
- companion cube
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