Dark Dungeons X (2020)

From publisher blurb:

Dark Dungeons, the retro-roleplaying game in the style of old-school 1980’s and 1990’s role-playing when rogues were thieves, races were classes, and you could start your adventuring careed exploring a few basic dungeons and end up travelling the planes as a being of pure divine power is back for a tenth anniversary edition!

This new edition is the entire game in a single book, so there is no need to cross- reference between multiple rule books and supplements, and it contains all the rules from both Dark Dungeons and Darker Dungeons, as well as extensive developer commentary explaining which rules were kept from the source material and which were changed (and why).