The old-school fantasy Midlands role-playing game Midderlands runs on Swords & Wizardry Complete… but is now Kickstarting for a Midderlands D&D 5e edition. I’m no expert on tabetop RPGs but it looks like this will convert the existing game and its material to run with the popular Dungeons & Dragons Fifth Edition, in the form of a single large letter-sized book (the American ‘sort-of A4’). The Kickstarter for this ends 2nd April 2020, and currently looks like it has a good chance of hitting its target.

I have a Midderlands Stoke-on-Trent expansion, for free.