Since the COVID-19 pandemic started, I haven't been able to get together with my gaming group and we've decided not to go the online play route. In the meantime, I wanted to keep my DM skills sharp, so I've released an in-browser solo adventure,
The Saint's Tomb, using 5e rules. The game requires you to have a character sheet and keep up with HP and inventory, but runs enemies and the story for you. This is similar to the old Fighting Fantasy gamebooks and other single-player books for RPGs.
If you're running Lost Mines of Phandelver, there's a hook in one of the endings that suggests joining up with a group that just left for a frontier town, escorting a wagonload of supplies. I put this in to allow for players who want to join an in-progress game to jump in without feeling left behind.
