- German theatrical and VHS releases were cut for violence to secure "Not under 16" rating from FSK. All cuts have since been waived with the German Blu-ray release with the same "Not under 16" rating.
- Originally filmed with an ending in which Ray Cameron walks out of the house as a zombie, then collapses in front of a cemetery as the slug-like creatures escape from his body and head toward the graves; the alien spacecraft from the opening scene then arrives and begins to search the graveyard with spotlights. For the original theatrical and home video releases this was replaced with a briefer ending in which a slug-creature jumps out of the zombie-dog's mouth as the characters watch the sorority house burn down. The version with the original ending was used for some TV airings and later released as the Director's Cut (which includes the re-shot ending as a separate bonus feature).
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