Several references and cameos to Silicon Knights' previous title, Eternal Darkness, can be found in the game;

• When placed down, the pages on the Book item show pictures of Alexandra Roivas, the main protagonist for Eternal Darkness.
• A poster of Pious Augustus, the main antagonist of Eternal Darkness, can be found in a locker in B2 Armory.
• In Hal's lab on the far southeast, there is a very hard to see magazine with the Eternal Darkness logo on it on the magazine rack.
• On the second floor of the Tank Hangar room, there is a computer monitor displaying the Silicon Knights website on it, specifically the page for Eternal Darkness.