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Aperture Science Self Esteem Field

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The subject matter of this article contains in-development information that was cut from the final version of an official and/or canonical source and appears in no other canonical source. It may also contain incomplete information since not all cut material is publicly known.

Aperture Science Self Esteem Field
General information

Aperture Science

Used by

Test Subjects

The Aperture Science Self Esteem Field,[1] referred to internally as the slowfield,[1][2] is a testing element cut from Portal 2.


In the almost fully functional code left in the retail release of Portal 2, the effect of the slowfield is pre-set to last 5.5 seconds upon activation; during this period, time for the player is slowed down fivefold by default while the field of view is decreased, a color overlay is displayed, and a set of sound effects is played.[2] Related to the field are slowtime_ entites[2] and, consequently, a cut +slowtime command, which can be found bound to the r key in one of the game's files.[3]

The only instance in which the full name of the testing element appears is in a cut quote by GLaDOS:

“You have just experienced an Aperture Science Self Esteem Field, which temporarily increases your reaction time.”

List of appearances[edit]


  1. 1.0 1.1 1.2 Portal 2 game files, scripts\vscripts\choreo\demo\glados_scenetable_include.nut
  2. 2.0 2.1 2.2 Portal 2 game files, scripts\vscripts\portal_slowfield\slowfield.nut
  3. Portal 2 game files, scripts\kb_def.lst

External links[edit]