The first thing you need to know is that there are 6 editions of actual Dungeons and Dragons proper and many more game systems that are aesthetically like Dungeons and Dragons and quite a few systems that are mechanically similar to some versions of Dungeons and Dragons but are completely different in theme and tone. So, do you mean: Some fantasy genre game, you don't care what system, just so long as it has swords, and sorcery, and a setting that predates hot and cold running potable water. Dungeons and Dragons Advanced Dungeons and Dragons Dungeons and Dragons Second Edition Dungeons and Dragons Third Edition. Dungeons and Dragons 3.5 Dungeons and Dragons Fourth Edition. Dungeons and Dragons Fifth Edition. Dungeons and Dragons Next Pathfinder d20 too many to list or something else entirely? I hope that helps.