The Dying Earth RPG is published by Pelgrane Press, and more closely follows the later books by Jack Vance. These, whilst still having most of the elements from the original stories, are lighter in tone with a sense of ironic humour running through them. Dying Earth game sessionstend to be improvisational and witty, with the GM simply describing a situation, then the players running with it. By default, the PCs play penniless rogues who must cheat and swindle their way through the world. They may have some skill at arms, but tend to avoid using it- fighting is dangerous. They may dabble in magic, but it's likely to backfire on them at a critical moment. Their only reliably effective weapons are their wits and their tongues.
The rules use the roll of a single six-sided dice. A result of one to three is a failure, four to six is success. If the roll fails, players can spend from their skill pools to re-roll. Thus, someone with a Quick Fingers skill of 4 can re-roll the dice when attempting to pick a pocket four times. 1 is a critical failure and costs 5 to re-roll, 6 is a critical success and restores 2 points. The spent points for re-rolls refresh whenever the characters rest in comfortable surroundings. Modifiers to difficulty usually consisty of altering how expensive re-rolls are. It's an unusual system, but once you graps it, a very good one. Online, it would simply need a bot that can roll 1D6 whenever someone types a command.
Another unique part of the rules is the experience system. Players are handed three taglines at the start of play. They must work these into a conversation at some point in the session, and are awarded XP for doing so. Using a tagline gets one point, using it in an appropriate situation gets two, and using it in a way that provokes hilarity from the rest of the group gets three. Examples of taglines are:-
"I have a superstitious nature. My appeal for Divine Aid was a reflexive utterance, not a spell."
"Please excuse my companion, who was dropped at birth."
"Come, let us drink wine and consider the matter dispassionately."
A player in my own gaming group got three points for using this last tagline as he was being dragged off to a dungeon by burly thugs.