Aperture Science Military Android

It appears that Aperture Science uses military androids. They are however never seen and mentioned only once, in Test Chamber 16.

Overview
During her series of tests, Chell is told by GLaDOS that the appropriate Test Chamber 16 is currently unavailable due to mandatory scheduled maintenance and that it has been replaced with "a live-fire course designed for military androids". While the chamber is highly dangerous and improper for human test subjects, GLaDOS merely apologies "for the inconvenience" and wishes Chell "the best of luck". In the chamber, Chell is first confronted to the Aperture Science Sentry Turrets and must defeat them with Weighted Storage Cubes sent through portals she creates with her gun. After the test is over, GLaDOS' message seems to be automatic, as she addresses Chell as she was an android herself while she congratuales her for succeeding. GLaDOS also reminds that Enrichment Center's "android hell", where androids are sent "at the first sign of defiance", "is a real place". If actually real, knowing GLaDOS for lying from time to time, this is probably an area where androids are punished, tortured, or partially (or fully) destroyed. As GLaDOS threatens in her message, Aperture Science androids must probably fear pain or fear for the message and the "android hell" to have a purpose.

List of appearances

 * Portal