>>96393051
OSRIC but, as others have mentioned, it does have some ommissions. For my group, everybody has a copy of OSRIC and I add in things from the DMG that are missing. OSRIC 3E is currently in production and looks to be an improvement. The current rules are free on their website and I encourage you to take a look. It's worked really well for my group. After a hiatus of a few years, we've established a weekly game and just played our 20th session.
Plus one intermission session of Mothership. That game isn't very good, but my players had fun.