This current version of D&D not only seems to be very friendly towards older D&D conversions, but also -- by extension -- to a lot of the OSR systems that were inspired by those older versions. I think I can see it working for the B/X and BECMI versions of D&D, as well as 1st Edition AD&D -- but I have no real feel for converting the other versions before and after. But it does make it possible to therefore use a lot of (a) old D&D material; and (b) a lot of OSR material.
Unofficial Conversion Document
Fortunately, for people interested in converting older materials (and some OSR systems), James Bowman has produced his own conversion guidelines for D&D 5th Edition.
At the time of this posting, it includes:
- BECMI to 5E (includes 0E, Holmes, and B/X) - last updated 12 August 2014
2E to 5E (includes 1E) - last updated 12 August 2014
- 3.5 to 5E (includes 3E and Pathfinder) - last updated 12 August 2014
- 4E to 5E - last updated 12 August 2014
Next to 5E - last updated 12 August 2014
- Castles & Crusades to 5E - last updated 12 August 2014
- Dungeon Crawl Classics RPG to 5E - last updated 12 August 2014
There's both an in-depth document and a quick reference document for each. Great work, Mr. Bowman.
Old School Style: GeomorphsI'm always happy to see old school maps and geomorphs online, not only because of the nostalgia factor, but also because of my gamer fascination with maps and the design philosophies behind creating 'geomorph' maps in RPGs and boardgames.
Michael Wenman currently is tackling how to create & design geomorphs on his blog in a fascinating (currently 10-part) series.
OSR Game System Listing
And if you're looking for various OSR systems that you might want to go through for source material and perhaps some cool game mechanic hacks for a one-shot, a short campaign, or a permanent house rule -- look no further than the D&D retroclone / neo-clone listing on Taxidermic Owlbear! Logos and links and short summaries aplenty!