If you loved Altered States, try The Hidden
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
What they share
Theyboth carry the paranoid mood tag, and they sit in Horror / Science Fiction / Thriller territory. If that's the register that drew you to Altered States, the second film will land in a comparable space — through a different lens.
paranoid
What The Hidden is
Black plastic telephone coils on a desk. A drunk driver’s headlights slice a motel sign. The city’s crimes are all the same: joyrides, back-alley brawls, lovers’ quarrels ending in knives. A pair of outsiders—one weathered, one green—trace the pattern to a single birthday party’s punch bowl. S.F. slasher on the scent of a wish come true.

