The VOIDRUNNER'S CODEX is LIVE! Explore new worlds, fight oppressive empires, fend off fearsome aliens, and wield deadly psionics with this comprehensive boxed set expansion for 5E and A5E!
To show one of my group's younger players what "old school" D&D was like, I dug up the old 1st edition Players Handbook, DMG, and Monster Manual and improvised a quick dungeon crawl. We were trying to give the young'un context with which to appreciate the advancement and improvements of the...
https://www.drivethrurpg.com/product/285021/Modern-Dungeon5
I like this one. It's not tied to any particular setting so you can build just about any kind of campaign with it.