Why is it that some 80s slashers are so bad they're great, and some are so bad they're bad? Where is that mysterious dividing line? I don't know. But to draw a comparison, when it comes to 'teens- locked-in-shopping-areas-overnight' slashers, whatever it was that made Chopping Mall such an enjoyable treat is completely absent in Intruder, despite the fact that (killer robots aside) both are fundamentally the same and both are completely crap. Chopping Mall is somehow a lot of fun, but Intruder completely drags from the start. Despite the bright colours and snappy camera angles, the whole thing feels enveloped by an invisible vacuum of dullness. It limps from one boring scene to the next and by the time the kills come I'd already lost interest. Even the actors seem bored. It's pointless being too critical because 80s slashers are like the Eddie "The Eagle" Edwards of the movie world anyway, but Intruder is just dull.