I'm looking at the chance to set up a new 5E game and I thought that an interesting setting for the game might be Acheron. Rather than offering up the usual races, I'm planning on starting the players off as 1st level goblins, and then expanding the available races as they inevitably get killed off (which I'm hoping should be pretty frequently) and/or reach in-game goals. Currently, I'm thinking of races like awakened skeletons, hobgoblins, tieflings, tso, and suchlike.
I'm also planning on restricting class and path choice unless I can come up with a decent alternative. Like, what form would an Acheron Planar Druid take? Sorcerers have draconic or wild magic types, neither of which feels appropriate for the setting. Paladins would probably be restricted to Path of Vengence.
I had originally thought to approach this like any other D&D type of game, with a solid party and adventuring locations and whatnot, but I can't help but wonder if the nature of the plane might call for something a bit more group tactics oriented. Like not awarding XP based on the number of kills the party got, but based on whether objectives were met, with deductions for character deaths. Possibly get each player to generate a roster of characters they could draw on. I don't know.
Anyway, I thought I'd share and see if anybody had any insight. I probably have a few months before any of this will be put to use (if at all), but I thought it could be an interesting exercise on it's own.