
The Weighted Companion Cube is a special type of Storage Cube that appears in both Portal and Portal 2. It is identical to the regular Weighted Storage Cube in both games, except that it has a heart where the Aperture Science logo would be.
At the end of the Test Chamber 17 in the original Portal, the player is forced to throw it into an Aperture Science Emergency Intelligence Incinerator. Narrative provided by GLaDOS and Doug Rattmann suggests that the Companion Cube is designed to test emotional stress by having subjects develop affection for it before being forced to destroy it.
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Portal 2 (2011)
Developed by Valve Corporation for WIN, PS3, X360
Portal 2 is a first-person puzzle-platform video game developed and published by Valve Corporation. It is the sequel to Portal and was released on April 18, 2011 for Microsoft Windows, Mac OS X, PlayStation 3, and Xbox 360. The retail versions of the game are distributed by Electronic Arts, while digital distribution of the Windows and OS X versions is handled by Valve's content delivery service Steam. Portal 2 was announced on March 5, 2010, following a week-long alternate reality game based on new patches to the original game.4.425 -
Portal (2007)
Developed by Valve Corporation for MAC, WIN, PS3, X360
Portal is a story-driven puzzle game, developed by Valve and released as part of The Orange Box and stand-alone for Microsoft Windows, Mac OS, Xbox 360, and PlayStation 3. A sequel, Portal 2, was released in 2011.4.375