Swe: OSR
Old School Revival, Old School Renaissance, Old School Revolution, or Old School Reformation.
Games that draws inspiration from the earliest days of tabletop RPGs. Concretely, that inspiration is summed up in the jargon word Appendix N.
'Appendix N' refers to Appendix N of the 1st edition AD&D Dungeon Masters Guide, which listed fiction that was an influence on Dungeons & Dragons.
(Do you play or care about an OSR game? Add it to the list.)
Alex Schroeder wrote a piece on Innovation and the Old School Renaissance which neatly summarizes the minor and major departures from trad dungeon gaming of the OSR subculture.