I gangsters

Maybe I've just seen too many old movies, but for me, other than the period fedoras and suits, nothing about this movie would really give away that it's almost 60 years old.

The plot is solid and keeps you guessing until the end, with many twists and turns along the way, and is told asynchronously (perhaps necessary for today's audiences, which may be why it holds up so well). The acting is great, quite realistic, and for the most part avoids the maudlin sentiment and overacting that characterizes some older films.

The Killers is an incredibly enjoyable crime film, perhaps the perfect crime film. I haven't seen the remake, so I can't comment on that, but I hold this film in high regard.