Give the missing member access to a map and help The other players through a labyrinth, maybe with some backtracking to open doors with levers or lots of crossroads to take wrong turns into
ttrpg
Tabletop Rpg posts, content, and recruitment posts.
Recruitment posts should contain what system is being played, CW for any adult/serious themes players need to be aware of and whether a game is beginner friendly.
An obvious reminder of no racism, sexism, ableism, homophobia and transphobia.
Emphasis on small independent rpgs like the ones in the TTRPGs for Trans Rights in Texas but not against dnd stuff.
Ooh I like this. The extra player could also give information on enemies' weaknesses: maybe the main group can identify enemies by their traits or characteristics, and the solo guy can then be like "Oh I know this one!"
This is good, I'm thinking maybe there are doors that send them back to the start that are marked subtly on the map but look normal in the dungeon so they'll have to work together to figure out why they keep getting sent back to the start and which doors are safe.
So like that game where you have to disarm a bomb!
That's also a good one!