Borealis

The "Borealis is a lost mysterious ship originally owned by Aperture Science before they lost funding to Black Mesa. It's stranded in the ice in the North with its drydock and a mysterious weapon.

Portal in Half-Life Continuity

Borealis as seen in HL2: EP2

This is a picture seen at the end of Half-Life 2: Episode Two. There is a container labeled Aperture Science, so there definitely is a link between the Half-Life universe and Portal.

In this image you can see:

• The Borealis plans date back to January 1994.
• The Borealis has "Ice breaking capability 21 feet under full power".
• Two previous Black Mesa employees can be seen in a photo in front of the Borealis.
• "APERTURE SCIENCE LABS & ADMINISTRATION / ASSISTED (JAUNT?) CENTER - CLEVELAND, OH".

See Also

• Half-Life 2: Episode Two
• Half-Life 2: Episode Three
• Portal