I am currently running a heavily homebrewed game of Ultraviolet Grasslands with heavily homebrewed rules. Ultraviolet Grasslands, for those not in the know, is Luka Rejec's imminently-to-be-released masterpiece of 'steppe-crawling' goodness. The setting and rules are phenomenal at simulating looong periods of time over looong distances, tracking your party as they make pilgrimage through a psychedelic landscape over multiple timezones. Along the way you might come across Discoveries - strange ruins or settlements of the long-ago forgotten times potentially brimming with treasure and technology. One small trade-off is the rules don't really help with smaller distances and times like meters and minutes pottering around a dungeon. You could just use rules from D&D or another system, but you risk making the game too nitty-gritty and dungeon-centric, and soon you've forgotten about the wild, wide steppe and you're spending eight consecutive sessions hau