Tabletop

What are the best true “OSR” rulesets and campaigns?

dungeonmaster

Since you specifically mentioned campaigns, though...

I'm working on a campaign world that isn't ruleset agnostic. It is focusing on story, theme, and plot hooks, with NPC stats for different versions online. Gonna start posting stuff in /dungeonmaster if you wanna follow along...

CTO @a16zcrypto, lover of https://github.com/a16z/awesome-farcaster

Castles & Crusades and Dungeon Crawl Classics are two more that are often brought up. I can't speak to C&C, but I do have DCC.

As far as campaigns go, Lankhmar is set in DCC. It looked pretty good, and I did purchase the boxed set tournament that was set in Lankhmar.