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OSR stands for "Old School Renaissance." It is an umbrella term encompassing pre-D&D 3.0 versions of Dungeons & Dragons. The various older editions are closely related enough that an answer for one is often applicable to other editions.

OSR stands for "Old School Renaissance." It is an umbrella term encompassing pre-D&D 3.0 versions of Dungeons & Dragons. The various older editions are closely related enough that an answer for one is often applicable to other editions.

This encompasses the following:

  • Original Dungeons & Dragons
  • Basic Dungeons & Dragons (Holmes)
  • B/X Dungeons & Dragons (Moldvay/Cook)
  • BECMI Dungeons & Dragons (Mentzer)
  • Advanced Dungeons & Dragons 1st Edition (Gygax)
  • Advanced Dungeons & Dragons 2nd Edition (Cook)

Many reissues of the first rules (pre-AD&D) also exist and are classified as OSR too. This includes (alphabetical list, non comprehensive):

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