Question: What company published a fantasy tabletop role-playing game originally designed by Gary Gygax and Dave Arneson that has a book of rules that lack the complete set of rules for the game, and only includes rules for use by players of the game?
Sentence (from "Dungeons &amp; Dragons"): It was derived from miniature wargames with a variation of the "Chainmail" game serving as the initial rule system.
Relevant evidence: No