I'm running Mazes & Minotaurs . As a free game with no advertising budget, it certainly qualifies as "lesser known". While a cousin to D&D, its pseudo-classical setting, while not "weird" in the way that some more original settings are, is definitely distinct from the vastly more common pseudo-medieval RPG fantasy. <a href="https://app.roll20.net/campaigns/details/2907857/time-of-heroes-original-mazes-and-minotaurs" rel="nofollow">https://app.roll20.net/campaigns/details/2907857/time-of-heroes-original-mazes-and-minotaurs</a> if you think you might be interested.