If you loved The Platform, try Open Your Eyes
A bridge between a film you've already seen and one most people haven't. Open Your Eyes has roughly 6.6× fewer votes than The Platform — it's a deeper cut, not a mainstream recommendation. Here's what they share, and what the second one does that the first one doesn't.
What they share
Theysit in Drama / Science Fiction / Thriller territory. If that's the register that drew you to The Platform, the second film will land in a comparable space — through a different lens.
What Open Your Eyes is
Madrid nightlife, a sports car crashes, shattering glass. A disfigured face, a prison cell, a life unravels. Amenábar's first feature still disturbs.

