20 Things You Somehow Missed In Alien

Ridley Scott has gone on record numerous times to say that Blade Runner (like Predator) takes place in the same fictional universe as the Alien movies. While this has been teased and toyed with numerous times since, the initial clues for it do date back to this movie.

While escaping on the shuttle, Ripley sees a screen reading "Environment CTR Purge". It seems like random sci-fi techo-speak initially, but the same phrase also appears three years later in the police car Deckard travels in, denoting it's either manufactured by the same company or following the same procedures.