'Survival' movies

There seems to have been a few of these in recent years, where the protagonists find themselves isolated and up the creek without a paddle and are left to the mercy of nature. It has almost turned into a sub-genre. Here's a few I can think of:

Walkabout (1971) - A teenage girl and her brother are stranded in the Australian outback.
Alive (1993) - Plane survivors face starvation after a plane crash.
Apollo 13 (1995) - Maybe stretching the definition here since the astronauts remain in contact with Houston, but basically they are on their own.
Open Water (2004) - A scuba-diving couple are left behind at sea.
Adrift (2006) - A boat party can't get back on the boat after swimming in the sea.
Frozen (2010) - Three people become trapped in a ski lift as freezing temperatures set in.
127 hours (2010) - A man finds himself between a rock and a hard place.

Can anyone think of any more? I'm trying to steer clear of the "desert island" trope because there are so man of them: Robinson Crusoe, Cast Away The Blue Lagoon etc.