A 1985 film
based on Craig Harrison
's novel, directed by Geoff Murphy
. Dark, depressing
and wonderfully apocalpyptic
-- a man wakes up to find that he's the last person on Earth
. He goes out in search of other people
, hoping to figure out why he was left in solitude. To his luck, others exist... but why?
Personally, one of my favorite "noir" films. Excellent realism in the characters and dialogue and excellent cinematography.
Other movies that come to mind roughly in this genre:
THX1138, Soylent Green, Logan's Run, Dark City.