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Test Subject #042 is a Test Subject featured on a clipboard found in the Enrichment Center. #42 appears to be a chicken that failed the tests it took. It is unknown if these tests involved the Aperture Science Handheld Portal Device, as they are never mentioned elsewhere.
- Finding the clipboard in Portal: Still Alive will unlock the "Tests Like Chicken" Achievement.
List of appearances Edit
- Portal (First appearance) (Clipboard only)
- Portal: Still Alive (Non-canonical appearance) (Clipboard only)
- Portal 2 (Clipboard only)