I always try to keep in touch with what's happening in the gaming community. One thing that went under my radar was the throwback to earlier versions of D&D with games like Castles & Crusades or Osric. As an upcoming father, I'm yearning for simpler systems. I'm also changing from a campaign focused gamer to something closer to making one-shots with friends that includes pre-gens. How close are they to the basic set that went out years ago? What differences did they make? Can I take an old module (like Keep on the Borderlands) and play it without much modifications? Thanks!