It's a sword & sorcery game, with a focus on the short story end of the genre particularly inspired by Fritz Leiber’s Fafhrd & Gray Mouser series.
It is very prep-flexible. Swords requires absolutely no prep whatsoever, but is able to accommodate those lovingly detailed maps, carefully constructed NPC communities and well designed monsters you’ve sunk all that time into.
It's a fast playing game. Like a short story, it covers a lot of ground in very little time. Typical Swords games take about two to three hours, but can cover years of the characters’ adventures or the longest night of their lives.