GLaDOS and Caroline have formed an unlikely allegiance, and together test with the humans from the long lost vault. One Test Subject, however, leads to a terrible discovery, and the dark secrets of Aperture's past are revealed, as is its darker future.

Twilight accidently summons the engineer, and Necromorph slayer, Isaac Clarke into Equestria. Now she and Luna must deal with the armored interloper while they all search for the ponies who seek to ressurect the Marker. Rated - M for gore and language.

When the ponies become a part of a horrific universe of undead monsters, friendship is the only thing that can pull them through. This story does not require knowing the canon of Dead Space, though it helps.