Borealis

The "Borealis" is a lost mysterious ship. Originally owned by "Aperture Science" before they lost funding to Black Mesa.
It got lost when Chell in Portal causes the Super Portal to open and the Borealis got teleported to somewhere unknown.

The link between the Half-Life universe and Portal

Borealis as seen in HL2: EP2

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

See Also

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