* Billy's tattoo reads "Mother Love" -- like Claire and Chris' jackets, a reference to the title of a [[Music/QueenBand Queen]] song from the ''Music/MadeInHeaven'' album.
* The cargo elevator escape is a shout out to the escape sequence at the end of ''Film/{{Aliens}}''.
* The High Definition UpdatedReRelease contains two achievements for killing the infected and giant bats in the church -- "Winged Spawn of Satan" and "Die, Devil Bird" -- that are nods to lines from ''Film/AceVenturaPetDetective''.
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