12-14-2019, 06:01 AM
If picking by official D&D only: BECMI/RC with some OD&D in the mix.
Other:
Right now I would go to Blood&Treasure (I'm probably going to run this next...again). Mostly because it got lots of the races, classes, spells and items from the entire d20 SRD converted to something more akin to classic D&D. It helps when running 3.X modules with minimum conversion. But I could also go with some other retro D&D-like game. BX Advanced, Labyrinth Lord Advanced, Swords&Wizardry Complete, Castles&Crusades etc...
Other:
Right now I would go to Blood&Treasure (I'm probably going to run this next...again). Mostly because it got lots of the races, classes, spells and items from the entire d20 SRD converted to something more akin to classic D&D. It helps when running 3.X modules with minimum conversion. But I could also go with some other retro D&D-like game. BX Advanced, Labyrinth Lord Advanced, Swords&Wizardry Complete, Castles&Crusades etc...