If you loved How It Ends, try Air
A bridge between a film you've already seen and one most people haven't. Air has roughly 4.3× fewer votes than How It Ends — 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
Theyboth carry the dread mood tag, and they sit in Science Fiction / Thriller territory. If that's the register that drew you to How It Ends, the second film will land in a comparable space — through a different lens.
What Air is
Deep underground. Lifeless winter. A blinking console. Two technicians stir from hyper-sleep into a hermetic nightmare: equipment failures, dwindling oxygen, and fractured memories. Is their station the last bastion of humanity or its tomb? Claustrophobes should proceed with caution.

